1.1.7for iPhone, iPad
Age Rating
Apps in this category do not contain restricted content.
Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.
Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.
You must be at least 17 years old to access this App.
Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.
1A2B™ Screenshots
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About 1A2B™

1A2B also called "bulls and cows". It is an old-breaking paper and pencil game.

How to play:
When the game starts, it randomly generates 4 digit numbers from number 0 to number 9, all 4 digit are different. The 4 random numbers are what you need to figure out at end of the game, every game you have 8 times to guess.

First you have to guess 4 numbers to start your supposition. After that there’s a hint for you to amend the first supposition. There are eight chances for you to amend your supposition base on the hint till you find the right answer.
If your supposition shows right number and in the right position, you will gain an A. If your supposition shows right numbers in the wrong positions, you will gain B.


Amazing, we also include another famous puzzle game Mastermind.

Mastermind (named as ColorCode) is another challenge guessing game. If you are master of 1A2B, you should try this! You have 5 number guess way, 12 times to combine any color.

How to play:
The computer chooses a secret code, your goal is to find it, making proposals, the chosen colors and also their correct places in the code. Each proposal, computer will indicate whether the proposed colors are correct or misplaced.
A black mean same color and the same position as one of the secrect code.
A white mean same color but not the same position.

Rating us if you enjoy it! any feedback please contact azhuona@gmail.com
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What's New in the Latest Version 1.1.7

Last updated on Mar 28, 2019
Old Versions
- Mark feature added. - Refactor input view.
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Version History
Aug 16, 2017
- Mark feature added. - Refactor input view.
Aug 16, 2017
1. add 4 numbers 10 times to guess. 2. add 5 numbers 12 times to guess.
Aug 16, 2017
1. Bug fixes and optimizations. 2. New mode for 1A2B.


Click here to learn how to download 1A2B™ in restricted country or region.
Check the following list to see the minimum requirements of 1A2B™.
1A2B™ supports Chinese, English

1A2B™ Alternative

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