Deduce
A unique game of skill & logic
$2.99
4.0for iPhone, iPad
Age Rating
Deduce Screenshots
About Deduce
Deduce is a fun way to learn and visualize the process of logical deduction. It’s a uniquely challenging game combining logic, vocabulary, and spelling skills (with a small element of luck) played with words. Your goal is to discover a hidden mystery word with as few guesses as possible. Deduce acts as an assistant who enforces the rules, provides hints, keeps track of your progress, collects statistics, manages saved games, and (for Game Center users) awards achievements.
Reviewers have said:
"One of my favorite games", "Other games get installed-played-uninstalled, but this one stays", "Challenging and addictive", "Very original and lots of fun", "I'm completely hooked", "Hope I can stop playing it soon!"
Features:
1. Many thousands of possible games (more than 20,000)
2. Comfort level - Deduce can be as easy or challenging as you like, with optional features to assist your thinking. Play with easier 5 letter words or more difficult 6 letter words. NEVER ANY ADS TO DISTRACT YOU!
3. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Puzzle leaderboards. A Champions leaderboard ranks the overall quality of your play over time. Achievements may be earned based on the quality and persistence of your game play. As you earn Deduce achievements discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion, with a biography link, is awarded for each achievement -- collect them all!
3. Mystery Word definitions. When you finish a game of Deduce, a definition of the mystery word is provided. Increase your vocabulary as you play more games. Definitions come from’s Apple’s downloadable dictionaries or Wiktionary, whichever is available.
4. Game records. Save your games automatically or selectively. Create beautifully formatted PDFs of your games for sharing or printing.
5. Preferences. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games).
6. Easy sharing with friends or other devices. Find a game really challenging? You can challenge friends to find the same mystery word by sharing a Deduce game number via Airdrop, Messages, or email. Deduce also plays well on a shared device. Each family member can play using their own name or Game Center account with separate saved games, statistics, and (for Game Center users) achievements.
7. A polished user experience with improved marking and simpler game play. Use letter dials or a keyboard to enter your guesses. On an iPhone, enlarge guess list for easier manipulation. Reorder your guesses to see more potential patterns. Having trouble thinking of words? Use the Suggest button! Need advice about your game play? Tap on Sherlock for tips and encouragement. And check out the help info to learn about letter frequencies and common suffixes.
8. Select your favorite photo as a backdrop for playing Deduce, or use one of our two built-in backdrops.
Reviewers have said:
"One of my favorite games", "Other games get installed-played-uninstalled, but this one stays", "Challenging and addictive", "Very original and lots of fun", "I'm completely hooked", "Hope I can stop playing it soon!"
Features:
1. Many thousands of possible games (more than 20,000)
2. Comfort level - Deduce can be as easy or challenging as you like, with optional features to assist your thinking. Play with easier 5 letter words or more difficult 6 letter words. NEVER ANY ADS TO DISTRACT YOU!
3. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Puzzle leaderboards. A Champions leaderboard ranks the overall quality of your play over time. Achievements may be earned based on the quality and persistence of your game play. As you earn Deduce achievements discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion, with a biography link, is awarded for each achievement -- collect them all!
3. Mystery Word definitions. When you finish a game of Deduce, a definition of the mystery word is provided. Increase your vocabulary as you play more games. Definitions come from’s Apple’s downloadable dictionaries or Wiktionary, whichever is available.
4. Game records. Save your games automatically or selectively. Create beautifully formatted PDFs of your games for sharing or printing.
5. Preferences. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games).
6. Easy sharing with friends or other devices. Find a game really challenging? You can challenge friends to find the same mystery word by sharing a Deduce game number via Airdrop, Messages, or email. Deduce also plays well on a shared device. Each family member can play using their own name or Game Center account with separate saved games, statistics, and (for Game Center users) achievements.
7. A polished user experience with improved marking and simpler game play. Use letter dials or a keyboard to enter your guesses. On an iPhone, enlarge guess list for easier manipulation. Reorder your guesses to see more potential patterns. Having trouble thinking of words? Use the Suggest button! Need advice about your game play? Tap on Sherlock for tips and encouragement. And check out the help info to learn about letter frequencies and common suffixes.
8. Select your favorite photo as a backdrop for playing Deduce, or use one of our two built-in backdrops.
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What's New in the Latest Version 4.0
Last updated on Sep 18, 2023
Old Versions
Deduce 4.0 —The Most Challenging Word Game Gets Even Better!
• First time ever! Now play Deduce games with 5 or 6-letter words
• Another first: the ability to run Deduce on an M1 Mac
• Improved performance with reduced memory usage
• Support for different named users on a shared family device
• An improved Activity/Share sheet
• Revised Help information
• Many subtle bug fixes for improved reliability
• More than 20,000 unique games in one app!
This version of Deduce requires iOS/iPadOS 16 or later, and runs on M1 devices with macOS 13 or later
Deduce 1.0 was introduced on Jan 22, 2010.
Enjoy! And let us know if there are other features you would like to see in future releases. Email us with comments, suggestions, or bug reports at ObviouslyGenuine@me.com.
• First time ever! Now play Deduce games with 5 or 6-letter words
• Another first: the ability to run Deduce on an M1 Mac
• Improved performance with reduced memory usage
• Support for different named users on a shared family device
• An improved Activity/Share sheet
• Revised Help information
• Many subtle bug fixes for improved reliability
• More than 20,000 unique games in one app!
This version of Deduce requires iOS/iPadOS 16 or later, and runs on M1 devices with macOS 13 or later
Deduce 1.0 was introduced on Jan 22, 2010.
Enjoy! And let us know if there are other features you would like to see in future releases. Email us with comments, suggestions, or bug reports at ObviouslyGenuine@me.com.
Show More
Version History
4.0
Sep 18, 2023
Deduce 4.0 —The Most Challenging Word Game Gets Even Better!
• First time ever! Now play Deduce games with 5 or 6-letter words
• Another first: the ability to run Deduce on an M1 Mac
• Improved performance with reduced memory usage
• Support for different named users on a shared family device
• An improved Activity/Share sheet
• Revised Help information
• Many subtle bug fixes for improved reliability
• More than 20,000 unique games in one app!
This version of Deduce requires iOS/iPadOS 16 or later, and runs on M1 devices with macOS 13 or later
Deduce 1.0 was introduced on Jan 22, 2010.
Enjoy! And let us know if there are other features you would like to see in future releases. Email us with comments, suggestions, or bug reports at ObviouslyGenuine@me.com.
• First time ever! Now play Deduce games with 5 or 6-letter words
• Another first: the ability to run Deduce on an M1 Mac
• Improved performance with reduced memory usage
• Support for different named users on a shared family device
• An improved Activity/Share sheet
• Revised Help information
• Many subtle bug fixes for improved reliability
• More than 20,000 unique games in one app!
This version of Deduce requires iOS/iPadOS 16 or later, and runs on M1 devices with macOS 13 or later
Deduce 1.0 was introduced on Jan 22, 2010.
Enjoy! And let us know if there are other features you would like to see in future releases. Email us with comments, suggestions, or bug reports at ObviouslyGenuine@me.com.
3.8
Jun 22, 2020
Deduce 3.8—Now with Support for New iPad Pro’s & iPhone SE (Gen 2)!
Deduce 3.8 requires iOS 10.3 or later. It features the following improvements:
•Support for iOS 13
•User interface improvements targeting iPads plus iPhone X and later models
•Improved menus for iPadOS portrait orientation
•New “Smart Keyboard Cursor” - more intuitive staging area cursor movement
•Faster, smoother startup
•Better sharing support
•Two built-in game backgrounds
•An easier to use Novice mode, where the Suggest button may be used freely with no penalty to your score.
•New sorting features for arranging guesses and managing long lists of saved games
•Fixed some ambiguities in "Play a Specific Game" to correct a bug and simplify the input panel
•Many other subtle bug fixes
Some of you will be pleased to know that many older Apple devices are still supported including iPhone 5, iPad 2, iPad Mini 2, iPod Touch (5th Gen), etc.
A temporary restriction on the multiplayer feature is still in effect, but you can use the “Play a Specific Game” capability to manually challenge (or accept a challenge from) your friends in the meantime.
Deduce 1.0 was introduced on Jan 22, 2010.
Deduce 3.8 requires iOS 10.3 or later. It features the following improvements:
•Support for iOS 13
•User interface improvements targeting iPads plus iPhone X and later models
•Improved menus for iPadOS portrait orientation
•New “Smart Keyboard Cursor” - more intuitive staging area cursor movement
•Faster, smoother startup
•Better sharing support
•Two built-in game backgrounds
•An easier to use Novice mode, where the Suggest button may be used freely with no penalty to your score.
•New sorting features for arranging guesses and managing long lists of saved games
•Fixed some ambiguities in "Play a Specific Game" to correct a bug and simplify the input panel
•Many other subtle bug fixes
Some of you will be pleased to know that many older Apple devices are still supported including iPhone 5, iPad 2, iPad Mini 2, iPod Touch (5th Gen), etc.
A temporary restriction on the multiplayer feature is still in effect, but you can use the “Play a Specific Game” capability to manually challenge (or accept a challenge from) your friends in the meantime.
Deduce 1.0 was introduced on Jan 22, 2010.
3.7
Mar 27, 2020
Deduce 3.7 features the following improvements:
•Support for iOS 13 and iPadOS 13
•User interface improvements targeting iPads plus iPhone X and later models
•Better sharing support
•Two builtin game backgrounds
•New sorting features for arranging guesses and managing long lists of saved games
•Many subtle bug fixes
Some of you will be pleased to know that many older Apple devices are still supported including iPhone 4s, iPad 2, iPad Mini 2, iPod Touch (5th Gen), etc.
A temporary restriction on the multiplayer feature is in effect, but you can use the “Play a Specific Game” capability to manually challenge (or accept a challenge from) your friends in the meantime.
Deduce 1.0 was introduced on Jan 22, 2010.
Enjoy! And let us know if there are other features you would like to see in future releases. Email us with comments, suggestions, or bug reports at ObviouslyGenuine@me.com.
•Support for iOS 13 and iPadOS 13
•User interface improvements targeting iPads plus iPhone X and later models
•Better sharing support
•Two builtin game backgrounds
•New sorting features for arranging guesses and managing long lists of saved games
•Many subtle bug fixes
Some of you will be pleased to know that many older Apple devices are still supported including iPhone 4s, iPad 2, iPad Mini 2, iPod Touch (5th Gen), etc.
A temporary restriction on the multiplayer feature is in effect, but you can use the “Play a Specific Game” capability to manually challenge (or accept a challenge from) your friends in the meantime.
Deduce 1.0 was introduced on Jan 22, 2010.
Enjoy! And let us know if there are other features you would like to see in future releases. Email us with comments, suggestions, or bug reports at ObviouslyGenuine@me.com.
3.6
Sep 29, 2018
Deduce 3.6—Now with iPhone X, Xs & Xs Max support!
Deduce 3.6 requires iOS 9 or later. It features the following improvements:
•Support for iOS 12
•New iPhone X model layouts
•Improved sharing options
•Plugged a small memory leak
•Some minor bug fixes
Deduce 3.6 requires iOS 9 or later. It features the following improvements:
•Support for iOS 12
•New iPhone X model layouts
•Improved sharing options
•Plugged a small memory leak
•Some minor bug fixes
3.5
Mar 15, 2016
Deduce 3.5—Now with iPadPro support!
Caution: Deduce 3.5 requires iOS 9 or later! It features the following improvements:
•Native layout support for iPadPro
•Streamlined startup sequence
•Fixes a scrolling bug
•Fixes an occasional crash on some iPhone models
Caution: Deduce 3.5 requires iOS 9 or later! It features the following improvements:
•Native layout support for iPadPro
•Streamlined startup sequence
•Fixes a scrolling bug
•Fixes an occasional crash on some iPhone models
3.4
Sep 16, 2015
Caution: Deduce 3.4 requires iOS 8 or later! It features the following improvements:
• Full iOS 8 support, and tested with iOS 9 betas.
• Native support for iPhone 6, 6 Plus, and future models, using autolayout techniques.
• Greatly improved performance.
• Fixes for many small, but annoying bugs.
• A new reset button offers a convenient way to clear the input staging area when using the letter dials or the software keyboard.
• For iPhone and iPod users, a small button near the upper left of the list of guesses makes it simple to enlarge (or shrink) the list for easier tapping on individual letters.
• If you were using the Autosave feature to automatically save each of your completed games, go to the Apple Settings app, scroll down the list of apps on the left until you find Deduce, then switch the Autosave button off and back on again. This will re-activate the Autosave feature. Note that autosaved games show up in the Deduce Game Manager section, and do not include games that you resign (unless you choose to save them manually yourself).
• You may notice that we removed the “floating words” option. That feature is now redundant. Use the Suggest button to find words matching specific patterns, or tap on Sherlock in the Menu dialog to see a random list of words in the backdrop.
• And finally, some news: we expect to be able to restore Deduce’s multiplayer capability with the future release of Deduce 4.
• Full iOS 8 support, and tested with iOS 9 betas.
• Native support for iPhone 6, 6 Plus, and future models, using autolayout techniques.
• Greatly improved performance.
• Fixes for many small, but annoying bugs.
• A new reset button offers a convenient way to clear the input staging area when using the letter dials or the software keyboard.
• For iPhone and iPod users, a small button near the upper left of the list of guesses makes it simple to enlarge (or shrink) the list for easier tapping on individual letters.
• If you were using the Autosave feature to automatically save each of your completed games, go to the Apple Settings app, scroll down the list of apps on the left until you find Deduce, then switch the Autosave button off and back on again. This will re-activate the Autosave feature. Note that autosaved games show up in the Deduce Game Manager section, and do not include games that you resign (unless you choose to save them manually yourself).
• You may notice that we removed the “floating words” option. That feature is now redundant. Use the Suggest button to find words matching specific patterns, or tap on Sherlock in the Menu dialog to see a random list of words in the backdrop.
• And finally, some news: we expect to be able to restore Deduce’s multiplayer capability with the future release of Deduce 4.
3.3
Apr 18, 2014
This version restores Deduce's AirPrint capability (which disappeared with the release of iOS 7.1).
3.2
Jan 10, 2014
Bug fixes & improved stability. New Puzzle leaderboard tracks mean scores for 25 or more puzzles.
3.01
Sep 24, 2013
Note to users running prior versions of Deduce with iOS 7: due to an unfixed Apple defect in iOS 7, arbitrary sequences of letters may be accepted as guesses. A work-around in the iOS 7 version of Deduce fixes this; please upgrade to the latest version of Deduce (3.01).
Ignoring Game Center login also fixed with this release (3.01).
Deduce 3.0 & 3.01—Now completely re-imagined for iOS 7!
Starting with our new icon featuring the master of deduction, Deduce 3.0 sports a lighter, more intuitive look and feel, and many new features including:
• A new puzzle form of Deduce. Since the words you need to discover the Mystery Word have been preselected, it's a great way to visualize the logical implications of a choice while learning the mechanics of proposing or eliminating letters.
• Easier game play. A greatly enhanced Suggest button is available whenever you have trouble thinking of a possible word, but it comes with a price! Each suggestion you request lowers your potential score. Also, you may now manually reorder your guesses to keep related words or hit counts together as the game progresses.
• Better layout and arrangement of game controls, particularly when played on an iPhone or iPod Touch.
• More ways to save, manage, and share your game experience.
• Tap Sherlock whenever you need advice or encouragement.
• Optionally use one of your own images as the backdrop for your game play, with included iOS 7 motion effects.
A temporary restriction in this new version: multi-player mode has been disabled. Not many of you have been using it, and we think we know why! Look for a significantly enhanced multi-player capability in a free future upgrade.
It's now easier than ever to rate or review Deduce (first, sign in to Game Center, then from Deduce, tap Menu->Game Manager->Player->Leaderboards and select your choice of stars). Let us know what you think of the changes and particularly the new Deduce Puzzles.
Enjoy! And let us know if there are other features you would like to see in future releases. Visit us at www.ObviouslyGenuine.com.
Ignoring Game Center login also fixed with this release (3.01).
Deduce 3.0 & 3.01—Now completely re-imagined for iOS 7!
Starting with our new icon featuring the master of deduction, Deduce 3.0 sports a lighter, more intuitive look and feel, and many new features including:
• A new puzzle form of Deduce. Since the words you need to discover the Mystery Word have been preselected, it's a great way to visualize the logical implications of a choice while learning the mechanics of proposing or eliminating letters.
• Easier game play. A greatly enhanced Suggest button is available whenever you have trouble thinking of a possible word, but it comes with a price! Each suggestion you request lowers your potential score. Also, you may now manually reorder your guesses to keep related words or hit counts together as the game progresses.
• Better layout and arrangement of game controls, particularly when played on an iPhone or iPod Touch.
• More ways to save, manage, and share your game experience.
• Tap Sherlock whenever you need advice or encouragement.
• Optionally use one of your own images as the backdrop for your game play, with included iOS 7 motion effects.
A temporary restriction in this new version: multi-player mode has been disabled. Not many of you have been using it, and we think we know why! Look for a significantly enhanced multi-player capability in a free future upgrade.
It's now easier than ever to rate or review Deduce (first, sign in to Game Center, then from Deduce, tap Menu->Game Manager->Player->Leaderboards and select your choice of stars). Let us know what you think of the changes and particularly the new Deduce Puzzles.
Enjoy! And let us know if there are other features you would like to see in future releases. Visit us at www.ObviouslyGenuine.com.
3.0
Sep 18, 2013
Deduce 3.0—Now completely re-imagined for iOS 7!
Starting with our new icon featuring the master of deduction, Deduce 3.0 sports a lighter, more intuitive look and feel, and many new features including:
• A new puzzle form of Deduce. Since the words you need to discover the Mystery Word have been preselected, it's a great way to visualize the logical implications of a choice while learning the mechanics of proposing or eliminating letters.
• Easier game play. A greatly enhanced Suggest button is available whenever you have trouble thinking of a possible word, but it comes with a price! Each suggestion you request lowers your potential score. Also, you may now manually reorder your guesses to keep related words or hit counts together as the game progresses.
• Better layout and arrangement of game controls, particularly when played on an iPhone or iPod Touch.
• More ways to save, manage, and share your game experience.
• Tap Sherlock whenever you need advice or encouragement.
• Optionally use one of your own images as the backdrop for your game play, with included iOS 7 motion effects.
A temporary restriction in this new version: multi-player mode has been disabled. Not many of you have been using it, and we think we know why! Look for a significantly enhanced multi-player capability in a free future upgrade.
It's now easier than ever to rate or review Deduce (first, sign in to Game Center, then from Deduce, tap Menu->Game Manager->Player->Leaderboards and select your choice of stars). Let us know what you think of the changes and particularly the new Deduce Puzzles.
Enjoy! And let us know if there are other features you would like to see in future releases. Visit us at www.ObviouslyGenuine.com.
Starting with our new icon featuring the master of deduction, Deduce 3.0 sports a lighter, more intuitive look and feel, and many new features including:
• A new puzzle form of Deduce. Since the words you need to discover the Mystery Word have been preselected, it's a great way to visualize the logical implications of a choice while learning the mechanics of proposing or eliminating letters.
• Easier game play. A greatly enhanced Suggest button is available whenever you have trouble thinking of a possible word, but it comes with a price! Each suggestion you request lowers your potential score. Also, you may now manually reorder your guesses to keep related words or hit counts together as the game progresses.
• Better layout and arrangement of game controls, particularly when played on an iPhone or iPod Touch.
• More ways to save, manage, and share your game experience.
• Tap Sherlock whenever you need advice or encouragement.
• Optionally use one of your own images as the backdrop for your game play, with included iOS 7 motion effects.
A temporary restriction in this new version: multi-player mode has been disabled. Not many of you have been using it, and we think we know why! Look for a significantly enhanced multi-player capability in a free future upgrade.
It's now easier than ever to rate or review Deduce (first, sign in to Game Center, then from Deduce, tap Menu->Game Manager->Player->Leaderboards and select your choice of stars). Let us know what you think of the changes and particularly the new Deduce Puzzles.
Enjoy! And let us know if there are other features you would like to see in future releases. Visit us at www.ObviouslyGenuine.com.
2.4
Mar 13, 2013
Enhanced Twitter support and fix for rotation bug (iOS6 only).
2.3
Oct 9, 2012
Added iOS 6 and iPhone 5 support to take advantage of the increased screen real estate. Added the Champions leader board, where your ranking depends on the overall quality of your play over time.
2.2
May 16, 2012
Deduce 2.2 - Fixes an iPad bug affecting guess list scrolling when dismissing the keyboard.
2.1
Apr 28, 2012
Now, by popular demand, you may use either the letter dials or a keyboard to enter your guesses. Switch back and forth between dials or keyboard at any time. Deduce is fully enabled for retina displays.
2.0.2
Mar 27, 2012
Deduce 2.0.2 fixes a bug that incorrectly displayed achievements when using IOS 5.1 on a device with a retina display.
Deduce 2.0.1 is a maintenance release which fixes some small bugs and activates an additional feature that did not make it into the 2.0 release: an Earned Achievements list for Game Center players. Go to Menu->Game Manager->Player->Earned Achievements. Tap on any of your earned achievements to learn about the literary personage it represents.
Deduce 2.0 is a major revision of the original game and features integrated Game Center support with online match play. Notable improvements include
1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards, and achievements may be earned based on the quality and persistence of your game play. Earn achievements with Deduce to discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!
2. Online Matches. Use Game Center to play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.
3. Mystery Word definitions. When you finish a game of Deduce, a definition of your mystery word is provided. Increase your vocabulary as you play more games.
4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.
5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games), and control whether or not mystery words are reused.
6. Tweeting (iOS 5 only). Find a particular game really challenging? Tweet about it to your friends.
7. Minor improvements to the user interface, including simplifications and a sound effects volume setting. If you marked a letter by tapping it, you can now unmark it by tapping it again.
8. Additional words. We taught Deduce more than 400 additional 6 letter words.
9. Minor bug fixes throughout the program.
A note for those upgrading from Deduce 1.4.3:
Games that you have previously saved (using Game Manager) are preserved under an anonymous player name. To access these games you must be signed out of Game Center, then go to Game Manager and remove your player id. Games associated with an anonymous player will appear in the Game Manager list.
Be sure to upgrade your device to iOS 5.1 for the best Deduce user experience.
Deduce 2.0.1 is a maintenance release which fixes some small bugs and activates an additional feature that did not make it into the 2.0 release: an Earned Achievements list for Game Center players. Go to Menu->Game Manager->Player->Earned Achievements. Tap on any of your earned achievements to learn about the literary personage it represents.
Deduce 2.0 is a major revision of the original game and features integrated Game Center support with online match play. Notable improvements include
1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards, and achievements may be earned based on the quality and persistence of your game play. Earn achievements with Deduce to discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!
2. Online Matches. Use Game Center to play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.
3. Mystery Word definitions. When you finish a game of Deduce, a definition of your mystery word is provided. Increase your vocabulary as you play more games.
4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.
5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games), and control whether or not mystery words are reused.
6. Tweeting (iOS 5 only). Find a particular game really challenging? Tweet about it to your friends.
7. Minor improvements to the user interface, including simplifications and a sound effects volume setting. If you marked a letter by tapping it, you can now unmark it by tapping it again.
8. Additional words. We taught Deduce more than 400 additional 6 letter words.
9. Minor bug fixes throughout the program.
A note for those upgrading from Deduce 1.4.3:
Games that you have previously saved (using Game Manager) are preserved under an anonymous player name. To access these games you must be signed out of Game Center, then go to Game Manager and remove your player id. Games associated with an anonymous player will appear in the Game Manager list.
Be sure to upgrade your device to iOS 5.1 for the best Deduce user experience.
2.0.1
Jan 9, 2012
Deduce 2.0.1 is a maintenance release which fixes some small bugs and activates an additional feature that did not make it into the 2.0 release: an Earned Achievements list for Game Center players. Go to Menu->Game Manager->Player->Earned Achievements. Tap on any of your earned achievements to learn about the literary personage it represents.
Deduce 2.0 is a major revision of the original game and features integrated Game Center support with online match play. Notable improvements include
1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards, and achievements may be earned based on the quality and persistence of your game play. Earn achievements with Deduce to discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!
2. Online Matches. Use Game Center to play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.
3. Mystery Word definitions. When you finish a game of Deduce, a definition of your mystery word is provided. Increase your vocabulary as you play more games.
4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.
5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games), and control whether or not mystery words are reused.
6. Tweeting (iOS 5 only). Find a particular game really challenging? Tweet about it to your friends.
7. Minor improvements to the user interface, including simplifications and a sound effects volume setting. If you marked a letter by tapping it, you can now unmark it by tapping it again.
8. Additional words. We taught Deduce more than 400 additional 6 letter words.
9. Minor bug fixes throughout the program.
A note for those upgrading from Deduce 1.4.3:
Games that you have previously saved (using Game Manager) are preserved under an anonymous player name. To access these games you must be signed out of Game Center, then go to Game Manager and remove your player id. Games associated with an anonymous player will appear in the Game Manager list.
Be sure to upgrade your device to iOS 5 for the best Deduce user experience.
Deduce 2.0 is a major revision of the original game and features integrated Game Center support with online match play. Notable improvements include
1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards, and achievements may be earned based on the quality and persistence of your game play. Earn achievements with Deduce to discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!
2. Online Matches. Use Game Center to play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.
3. Mystery Word definitions. When you finish a game of Deduce, a definition of your mystery word is provided. Increase your vocabulary as you play more games.
4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.
5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games), and control whether or not mystery words are reused.
6. Tweeting (iOS 5 only). Find a particular game really challenging? Tweet about it to your friends.
7. Minor improvements to the user interface, including simplifications and a sound effects volume setting. If you marked a letter by tapping it, you can now unmark it by tapping it again.
8. Additional words. We taught Deduce more than 400 additional 6 letter words.
9. Minor bug fixes throughout the program.
A note for those upgrading from Deduce 1.4.3:
Games that you have previously saved (using Game Manager) are preserved under an anonymous player name. To access these games you must be signed out of Game Center, then go to Game Manager and remove your player id. Games associated with an anonymous player will appear in the Game Manager list.
Be sure to upgrade your device to iOS 5 for the best Deduce user experience.
2.0
Oct 11, 2011
Deduce 2.0 is a major revision of the original game and features integrated Game Center support with online match play. Notable improvements include
1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards, and achievements may be earned based on the quality and persistence of your game play. Earn achievements with Deduce to discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!
2. Online Matches. Use Game Center to play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.
3. Mystery Word definitions. When you finish a game of Deduce, a definition of your mystery word is provided. Increase your vocabulary as you play more games.
4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.
5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games), and control whether or not mystery words are reused.
6. Tweeting (iOS 5 only). Find a particular game really challenging? Tweet about it to your friends.
7. Minor improvements to the user interface, including simplifications and a sound effects volume setting. If you marked a letter by tapping it, you can now unmark it by tapping it again.
8. Additional words. We taught Deduce more than 400 additional 6 letter words.
9. Minor bug fixes throughout the program.
A note for those upgrading from Deduce 1.4.3:
Games that you have previously saved (using Game Manager) are preserved under an anonymous player name. To access these games you must be signed out of Game Center, then go to Game Manager and remove your player id. Games associated with an anonymous player will appear in the Game Manager list.
Be sure to upgrade your device to iOS 5 for the best Deduce user experience.
1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards, and achievements may be earned based on the quality and persistence of your game play. Earn achievements with Deduce to discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!
2. Online Matches. Use Game Center to play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.
3. Mystery Word definitions. When you finish a game of Deduce, a definition of your mystery word is provided. Increase your vocabulary as you play more games.
4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.
5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games), and control whether or not mystery words are reused.
6. Tweeting (iOS 5 only). Find a particular game really challenging? Tweet about it to your friends.
7. Minor improvements to the user interface, including simplifications and a sound effects volume setting. If you marked a letter by tapping it, you can now unmark it by tapping it again.
8. Additional words. We taught Deduce more than 400 additional 6 letter words.
9. Minor bug fixes throughout the program.
A note for those upgrading from Deduce 1.4.3:
Games that you have previously saved (using Game Manager) are preserved under an anonymous player name. To access these games you must be signed out of Game Center, then go to Game Manager and remove your player id. Games associated with an anonymous player will appear in the Game Manager list.
Be sure to upgrade your device to iOS 5 for the best Deduce user experience.
1.4.3
Dec 7, 2010
Deduce 1.4.3 fixes some visual user interface glitches that surface on iPads running iOS 4.2.1.
Deduce 1.4.2 released Oct 21, 2010 fixed several small bugs encountered when manually selecting a game number or a Mystery Word. Thanks to Dr. JL for reporting the problem.
Deduce 1.4.1 released Aug 2, 2010 fixed a bug that sometimes left the letter dials in an incorrect state following an "Unmark" operation.
Deduce 1.4 released July 17, 2010 was updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
Deduce 1.4.2 released Oct 21, 2010 fixed several small bugs encountered when manually selecting a game number or a Mystery Word. Thanks to Dr. JL for reporting the problem.
Deduce 1.4.1 released Aug 2, 2010 fixed a bug that sometimes left the letter dials in an incorrect state following an "Unmark" operation.
Deduce 1.4 released July 17, 2010 was updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
1.4.2
Oct 21, 2010
Deduce 1.4.2 fixes several small bugs encountered when manually selecting a game number or a Mystery Word. Thanks to Dr. JL for reporting the problem.
Deduce 1.4.1 released Aug 2, 2010 fixed a bug that sometimes left the letter dials in an incorrect state following an "Unmark" operation.
Deduce 1.4 released July 17, 2010 was updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
Deduce 1.4.1 released Aug 2, 2010 fixed a bug that sometimes left the letter dials in an incorrect state following an "Unmark" operation.
Deduce 1.4 released July 17, 2010 was updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
1.4.1
Aug 2, 2010
Deduce 1.4.1 fixes a bug that sometimes left the letter dials in an incorrect state following an "Unmark" operation.
Deduce 1.4 released July 17, 2010 was updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
Deduce 1.4 released July 17, 2010 was updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
1.4
Jul 17, 2010
Deduce 1.4 has been updated to work with iOS 4.0. Additional improvements include
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
1. By popular demand, the Unmark button now works more like "undo most recent mark". For each tap, only the most recent mark you made is removed. To remove all of your marks, just shake the device, or tap "Unmark" repeatedly until it grays out.
2. If you have elected not to display guesses with zero hits (via a horizontal swipe), and you then enter a new guess which also has zero hits, the invisible guesses will appear briefly and then disappear again.
3. The screen formerly labelled "Game Setup" is now referred to as the Menu (iPhone/iPod Touch only).
4. Program loading time has been slightly improved.
5. Some minor bugs were also fixed.
1.3
May 5, 2010
Deduce 1.3 is a universal app that has been fully redesigned to take advantage of the new features of the iPad. If you like the iPhone/iPod Touch version, you'll love this on the iPad!
1. New design for the iPad.
2. The dials are now available as a popover under your control (iPad).
3. New "floating ideas" feature for people who can't think of 6 letter words (iPad).
4. Room for more guesses before scrolling occurs (iPad).
5. New feature added to the Game Manager: Save & Start New Game (all platforms).
6. The Suggest button now works in a more intuitive fashion (all platforms).
7. Minor bug fixes (iPhone, iPod Touch & iPad).
1. New design for the iPad.
2. The dials are now available as a popover under your control (iPad).
3. New "floating ideas" feature for people who can't think of 6 letter words (iPad).
4. Room for more guesses before scrolling occurs (iPad).
5. New feature added to the Game Manager: Save & Start New Game (all platforms).
6. The Suggest button now works in a more intuitive fashion (all platforms).
7. Minor bug fixes (iPhone, iPod Touch & iPad).
1.2
Mar 5, 2010
Deduce 1.2 is a significant point release with improvements in several areas:
1. Now with Multi-Touch pinch support and other standard gestures (including shake and swipe) to manipulate the guess list!
2. A Game Manager has been added to let you save, switch, and share your games with others at any time.
3. By popular demand: we’ve improved the process of entering multiple guesses. The dials now stay active until you explicitly dismiss them.
4. Pressing the external lock button now stops the timer automatically.
5. We lowered most of the sound effects by a few decibels.
1. Now with Multi-Touch pinch support and other standard gestures (including shake and swipe) to manipulate the guess list!
2. A Game Manager has been added to let you save, switch, and share your games with others at any time.
3. By popular demand: we’ve improved the process of entering multiple guesses. The dials now stay active until you explicitly dismiss them.
4. Pressing the external lock button now stops the timer automatically.
5. We lowered most of the sound effects by a few decibels.
1.1
Feb 9, 2010
Deduce 1.1 fixes some minor problems in the first release:
1. You can now enjoy Deduce while music from your iPod plays in the background.
2. If you are so inclined, you can use Deduce while still on a phone call.
3. We taught Deduce some additional 6 letter words (but we're not going to tell you which ones; it might spoil the fun).
4. Diagrams and charts in the help materials can now be stretched. Use the new "Stretchable" button to enable this.
5. We found and removed some minor memory leaks.
Enjoy! And let us know if there are other features you would like to see in future releases.
1. You can now enjoy Deduce while music from your iPod plays in the background.
2. If you are so inclined, you can use Deduce while still on a phone call.
3. We taught Deduce some additional 6 letter words (but we're not going to tell you which ones; it might spoil the fun).
4. Diagrams and charts in the help materials can now be stretched. Use the new "Stretchable" button to enable this.
5. We found and removed some minor memory leaks.
Enjoy! And let us know if there are other features you would like to see in future releases.
1.0
Jan 21, 2010
Deduce FAQ
Click here to learn how to download Deduce in restricted country or region.
Check the following list to see the minimum requirements of Deduce.
iPhone
Requires iOS 16.0 or later.
iPad
Requires iPadOS 16.0 or later.
Deduce supports English
