O'der stack
Flexible scientific calculator
FreeOffers In-App Purchases
2.4for iPhone, iPad and more
Age Rating
O'der stack Screenshots
About O'der stack
O'der stack is a scientific calculator that is precise for up to 38 digits and is highly flexible.
It can be used for various purposes, from learning to professional use, and has many functions that are convenient when mastered.
The formulas described can be saved together with the results of the calculations and easily shared among members.
Also, labels and memos can be set for formulas as well as each item that makes up the formulas.
For example, by adding the label "radius" to "50" in 2 x 50 x π, it is possible to make the meaning of the formula even clearer.
It is also perfect for entering explanations of formulas as memos and using them as tools to assist in learning.
O'der stack offers two plans, the Pro plan which offers unlimited use of all functions, as well as the Free plan which makes it usable as an easy-to-use scientific calculator.
—Functions—
1. A powerful editing function that allows partial overwriting of values without erasing the formula
2. Label and memo functions to support the understanding of formulas
3. A clipboard function that allows formulas to be pasted in notebooks, etc.
4. Setting the precision of calculations from 0 digits to 38 digits
5. Setting units (degrees/radians) for trigonometric functions
6. Setting the format of displaying results of calculations (normal notation, scientific notation, and percentage notation)
7. Basic functions (exponentiation and nth root)
8. Undo function
—Pro plan—
Please download O'der stack and try out the Pro plan for free for seven days.
In addition to all the functions in the Free plan, the Pro plan allows for the activation of even more convenient functions.
1. Functions to save and load formulas and calculation histories
2. Function to share formulas and calculation histories
3. A sub-formula function that allows for the breakdown into several formulas and simple entry
4. 18 types of versatile and widely-used functions
5. 652 highly precise numerical and physical constants and observed values
6. Setting the format of displaying results of calculations (binary, octal, hexadecimal)
- Each item can be selected from 8bit, 16bit, 24bit, 32bit, 64bit and 128bit.
- Supports negative values and decimal points.
- Negative values are displayed in complement.
After the free trial has ended, if you would like to continue to use the Pro plan, a purchase of a non-autorenew-subscriptionis required.
For a subscription, you can choose either a monthly purchase or yearly purchase, and the yearly purchase allows you to enjoy a discount worth two months of monthly purchases.
Payment will be charged to your Apple ID account at the confirmation of purchase.
If you purchase a plan during the effective period, it will be extended by the number of days of the purchased plan from the end date.
The plan is effective on all devices linked to the purchased Apple ID account.
Privacy policy
https://ictfractal.github.io/official/PrivacyPolicy.html
Terms of service
https://ictfractal.github.io/official/AppTerms.pdf
Disclaimer
ICT Fractal Inc. does not guarantee the accuracy, credibility, and compatibility of the results of calculations and information provided through this app.
Furthermore, it does not bear the responsibility for direct or indirect damages that might occur through this app.
It can be used for various purposes, from learning to professional use, and has many functions that are convenient when mastered.
The formulas described can be saved together with the results of the calculations and easily shared among members.
Also, labels and memos can be set for formulas as well as each item that makes up the formulas.
For example, by adding the label "radius" to "50" in 2 x 50 x π, it is possible to make the meaning of the formula even clearer.
It is also perfect for entering explanations of formulas as memos and using them as tools to assist in learning.
O'der stack offers two plans, the Pro plan which offers unlimited use of all functions, as well as the Free plan which makes it usable as an easy-to-use scientific calculator.
—Functions—
1. A powerful editing function that allows partial overwriting of values without erasing the formula
2. Label and memo functions to support the understanding of formulas
3. A clipboard function that allows formulas to be pasted in notebooks, etc.
4. Setting the precision of calculations from 0 digits to 38 digits
5. Setting units (degrees/radians) for trigonometric functions
6. Setting the format of displaying results of calculations (normal notation, scientific notation, and percentage notation)
7. Basic functions (exponentiation and nth root)
8. Undo function
—Pro plan—
Please download O'der stack and try out the Pro plan for free for seven days.
In addition to all the functions in the Free plan, the Pro plan allows for the activation of even more convenient functions.
1. Functions to save and load formulas and calculation histories
2. Function to share formulas and calculation histories
3. A sub-formula function that allows for the breakdown into several formulas and simple entry
4. 18 types of versatile and widely-used functions
5. 652 highly precise numerical and physical constants and observed values
6. Setting the format of displaying results of calculations (binary, octal, hexadecimal)
- Each item can be selected from 8bit, 16bit, 24bit, 32bit, 64bit and 128bit.
- Supports negative values and decimal points.
- Negative values are displayed in complement.
After the free trial has ended, if you would like to continue to use the Pro plan, a purchase of a non-autorenew-subscriptionis required.
For a subscription, you can choose either a monthly purchase or yearly purchase, and the yearly purchase allows you to enjoy a discount worth two months of monthly purchases.
Payment will be charged to your Apple ID account at the confirmation of purchase.
If you purchase a plan during the effective period, it will be extended by the number of days of the purchased plan from the end date.
The plan is effective on all devices linked to the purchased Apple ID account.
Privacy policy
https://ictfractal.github.io/official/PrivacyPolicy.html
Terms of service
https://ictfractal.github.io/official/AppTerms.pdf
Disclaimer
ICT Fractal Inc. does not guarantee the accuracy, credibility, and compatibility of the results of calculations and information provided through this app.
Furthermore, it does not bear the responsibility for direct or indirect damages that might occur through this app.
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What's New in the Latest Version 2.4
Last updated on Oct 1, 2021
Old Versions
Compatible with iOS 15.
Show More
Version History
2.4
Oct 1, 2021
Compatible with iOS 15.
2.3
Feb 26, 2021
Compatible with iOS14.
2.2
Sep 25, 2019
Bug fix.
2.1
Jun 22, 2019
Added 216 observed values.
A total of 652 constants and observed values can be used.
A total of 652 constants and observed values can be used.
2.0
Jun 8, 2019
The following items have been added to the display format of calculation results.
1. Binary number
2. Octal number
3. Hexadecimal
Each item can be selected from 8bit, 16bit, 24bit, 32bit, 64bit and 128bit.
It supports negative values and decimal points.
Negative values are displayed in complement.
1. Binary number
2. Octal number
3. Hexadecimal
Each item can be selected from 8bit, 16bit, 24bit, 32bit, 64bit and 128bit.
It supports negative values and decimal points.
Negative values are displayed in complement.
1.2
May 20, 2019
Added 39 new physical constants.
1.1
May 13, 2019
Supported split view.
1.0
May 4, 2019
O'der stack FAQ
Click here to learn how to download O'der stack in restricted country or region.
Check the following list to see the minimum requirements of O'der stack.
iPhone
Requires iOS 14.1 or later.
iPad
Requires iPadOS 14.1 or later.
iPod touch
Requires iOS 14.1 or later.
O'der stack supports English, Japanese
O'der stack contains in-app purchases. Please check the pricing plan as below:
Free trial for 7 days.
$0.00
Activate for year.
$9.99
Activate for 1 month.
$0.99