T-Calc-Lite3.0.0 - App Store
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Publisher Description
A simple and easy-to-use calculator app that combines two calculators into one.
Calculators are displayed side by side when the screen is horizontal, and vertically when the screen is vertical.
In addition to being able to perform separate calculations with each calculator, calculation results can be also copy and paste with one touch, so you can perform other calculations during calculations, making it even more convenient to use than you might imagine.
There is also a paid version without ads. Please try it first.
https://apps.apple.com/jp/app/twin-calc/id1619292082
【feature】
1. Calculation results can be copy and paste between two calculators with one touch.
2. The result calculated can be input from one calculator to the other with one touch.
・When press the "→" key, the calculation result of the left calculator is entered at the end of the formula on the right calculator.
・When press the "←" key, the calculation result of the right calculator is entered at the end of the formula on the left calculator.
3. add, subtract, multiply and divide is performed.
Do multiplication and division first, then add and subtract.
4. Display the formula
The entered formula is displayed under the result, so you can easily check the operations.
5. Calculation results can be copied to iPhone’s memory
Calculation results can be pasted into other apps as text , so transcription errors will not occur.
Example of use
When you find a product for 988 yen for 3 pieces and a product for 1245 yen for 4 pieces while shopping, you can easily calculate "Which is cheaper?" And “How cheaper?"with this calculator.
1) Use the left and right calculators to find the unit price of the product (unit price = product price/number).
2) Tap the "- key" and "arrow key" on either the left or right calculator to calculate the unit price difference.
Limitations
・Answer can be calculated up to 9 digits, minimum 0.000000001.
Version History - Added support for iPhone Duo.
- Improved layouts for different screen sizes and orientations.
- Adjusted the positioning of calculation expressions and results.
- Fixed display issues on certain devices.
- Improved overall stability and fixed minor bugs. 3.0.0 3d ago • Calculation formulas and results are now preserved even after closing the app
• Your previous calculations are restored when you reopen the app
• Improved stability and minor bug fixes 2.7.4 Jan 15 •Buttons now visually highlight when tapped
•Bug fixes and performance improvements 2.7.3 Jan 11 •Improved layout when rotating between portrait and landscape
•Improved banner ad sizing for different screen widths
•General stability improvements 2.7.2 Jan 6 This update focuses on usability improvements and stability enhancements.
• Improved copy & paste behavior between calculators, including during and after calculations
• Refined repeated “=” operations to behave more like the iOS system calculator
• Improved display of long expressions so older parts are truncated naturally
• Fixed issues related to number input, sign toggle (+/−), and operator handling
• Enhanced layout stability when rotating the device or resizing the screen
• Improved support for locale-specific number formats (decimal and grouping separators)
• Various internal fixes to reduce crashes and calculation errors 2.7.1 Jan 6 Support URL and Marketing URL have been changed. 2.6.5 01/02/2023 Thank you for using our app. This version fixes the following items:
1) Solved the problem that the display collapses when the orientation of the smartphone is rotated.
2) Made other minor fixes. 2.6.4 11/27/2022 Thank you for usually using the App.
In this version, following items are revised.
1) Ad banner location was corrected.
2) App Icon was renewed. 2.6.3 11/24/2022 Thank you for using this App all the time.
This version fixes the following bugs.
1) Bug that number keys cannot be tapped under certain conditions
2) The screen collapses when the device is placed on a flat surface and the app is started.
3) Other minor fixes 2.6.2 10/26/2022 Thank you for using the app.
Also, thank you for the many warm comments and requests in the user reviews.
This time, the following improvements have been made.
1. Two calculators are always displayed regardless of the orientation of the smartphone. Due to the space on the screen, the calculators are arranged vertically in the case of the vertical screen.
2. Changed the color of the left and right arrow buttons to make it harder to press the wrong button.
3.Advertisements are displayed only on the vertical screen.
4. Other minor bug fixes 2.6.1 10/15/2022 Thank you for using the app.
Also, thank you for the many warm comments and requests in the user reviews.
This time, the following improvements have been made.
1. Two calculators are always displayed regardless of the orientation of the smartphone. Due to the space on the screen, the calculators are arranged vertically in the case of the vertical screen.
2. Changed the color of the left and right arrow buttons to make it harder to press the wrong button.
3.Advertisements are displayed only on the vertical screen.
4. Other minor bug fixes 2.6.0 10/13/2022 Small bug fix. 2.5.3 10/01/2022 Thank you for using our app.
Solved the issue that numeric keys cannot inputted after tapping the DEL key. 2.5.2 09/15/2022 Thank you for using it all the time.
Reviced point in this version:
・Press and hold the calculation result to copy it. You can use it by pasting it into Notepad, email, etc. 2.5.1 08/27/2022 Thank you for using our app.
The outline of this update is as follows.
1) Two calculators are always displayed on the horizontal screen when the app is started. You can use two calculators even if you set "Do not rotate the screen" in the settings.
2) Corrected so that calculation results, calculation formulas, and numeric keypad characters are displayed in the optimum size according to the size of the screen. 2.5.0 08/20/2022 Thank you for using our app.
This version, small bug has been fixed. 2.4.7 08/12/2022 Thank you for using this App.
In this version, the calculation method when tapping the % key has been improved.
For example, if you calculate 100-3%, subtract 3% of 100 from 100, and the result will be 97.
We will continue to reflect your opinions and requests in the future. Thank you for your cooperation. 2.4.6 08/05/2022 Thank you for using this App.
In this time, small bug has been fixed. 2.4.5 07/01/2022 Thank you for using this App.
In this time, small bug has been fixed. 2.4.4 06/29/2022 Thank you for using it.
Fixed a bug that characters are not displayed correctly 2.4.3 06/23/2022 Thank you for using App.
This time, we have improve the followings.
1) Enlarge the font size of each key and Calculation result.
2) Small bug fix 2.4.2 06/23/2022 Small bugs ware fixed. 2.4.1 06/22/2022 2.4.0 06/21/2022
About T-Calc-Lite
The company that develops T-Calc-Lite is Hiroyuki Ueda. The latest version released by its developer is 3.0.0.
To install T-Calc-Lite on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-14 and was downloaded 0 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the T-Calc-Lite as malware if the download link is broken.
How to install T-Calc-Lite on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the T-Calc-Lite is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After T-Calc-Lite is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 3.0.0
posted on 2026-10-14
Version History - Added support for iPhone Duo.
- Improved layouts for different screen sizes and orientations.
- Adjusted the positioning of calculation expressions and results.
- Fixed display issues on certain devices.
- Improved overall stability and fixed minor bugs. 3.0.0 3d ago • Calculation formulas and results are now preserved even after closing the app
• Your previous calculations are restored when you reopen the app
• Improved stability and minor bug fixes 2.7.4 Jan 15 •Buttons now visually highlight when tapped
•Bug fixes and performance improvements 2.7.3 Jan 11 •Improved layout when rotating between portrait and landscape
•Improved banner ad sizing for different screen widths
•General stability improvements 2.7.2 Jan 6 This update focuses on usability improvements and stability enhancements.
• Improved copy & paste behavior between calculators, including during and after calculations
• Refined repeated “=” operations to behave more like the iOS system calculator
• Improved display of long expressions so older parts are truncated naturally
• Fixed issues related to number input, sign toggle (+/−), and operator handling
• Enhanced layout stability when rotating the device or resizing the screen
• Improved support for locale-specific number formats (decimal and grouping separators)
• Various internal fixes to reduce crashes and calculation errors 2.7.1 Jan 6 Support URL and Marketing URL have been changed. 2.6.5 01/02/2023 Thank you for using our app. This version fixes the following items:
1) Solved the problem that the display collapses when the orientation of the smartphone is rotated.
2) Made other minor fixes. 2.6.4 11/27/2022 Thank you for usually using the App.
In this version, following items are revised.
1) Ad banner location was corrected.
2) App Icon was renewed. 2.6.3 11/24/2022 Thank you for using this App all the time.
This version fixes the following bugs.
1) Bug that number keys cannot be tapped under certain conditions
2) The screen collapses when the device is placed on a flat surface and the app is started.
3) Other minor fixes 2.6.2 10/26/2022 Thank you for using the app.
Also, thank you for the many warm comments and requests in the user reviews.
This time, the following improvements have been made.
1. Two calculators are always displayed regardless of the orientation of the smartphone. Due to the space on the screen, the calculators are arranged vertically in the case of the vertical screen.
2. Changed the color of the left and right arrow buttons to make it harder to press the wrong button.
3.Advertisements are displayed only on the vertical screen.
4. Other minor bug fixes 2.6.1 10/15/2022 Thank you for using the app.
Also, thank you for the many warm comments and requests in the user reviews.
This time, the following improvements have been made.
1. Two calculators are always displayed regardless of the orientation of the smartphone. Due to the space on the screen, the calculators are arranged vertically in the case of the vertical screen.
2. Changed the color of the left and right arrow buttons to make it harder to press the wrong button.
3.Advertisements are displayed only on the vertical screen.
4. Other minor bug fixes 2.6.0 10/13/2022 Small bug fix. 2.5.3 10/01/2022 Thank you for using our app.
Solved the issue that numeric keys cannot inputted after tapping the DEL key. 2.5.2 09/15/2022 Thank you for using it all the time.
Reviced point in this version:
・Press and hold the calculation result to copy it. You can use it by pasting it into Notepad, email, etc. 2.5.1 08/27/2022 Thank you for using our app.
The outline of this update is as follows.
1) Two calculators are always displayed on the horizontal screen when the app is started. You can use two calculators even if you set "Do not rotate the screen" in the settings.
2) Corrected so that calculation results, calculation formulas, and numeric keypad characters are displayed in the optimum size according to the size of the screen. 2.5.0 08/20/2022 Thank you for using our app.
This version, small bug has been fixed. 2.4.7 08/12/2022 Thank you for using this App.
In this version, the calculation method when tapping the % key has been improved.
For example, if you calculate 100-3%, subtract 3% of 100 from 100, and the result will be 97.
We will continue to reflect your opinions and requests in the future. Thank you for your cooperation. 2.4.6 08/05/2022 Thank you for using this App.
In this time, small bug has been fixed. 2.4.5 07/01/2022 Thank you for using this App.
In this time, small bug has been fixed. 2.4.4 06/29/2022 Thank you for using it.
Fixed a bug that characters are not displayed correctly 2.4.3 06/23/2022 Thank you for using App.
This time, we have improve the followings.
1) Enlarge the font size of each key and Calculation result.
2) Small bug fix 2.4.2 06/23/2022 Small bugs ware fixed. 2.4.1 06/22/2022 2.4.0 06/21/2022
version 2.7.4
posted on 2026-10-06
Version History • Calculation formulas and results are now preserved even after closing the app
• Your previous calculations are restored when you reopen the app
• Improved stability and minor bug fixes 2.7.4 Jan 15 •Buttons now visually highlight when tapped
•Bug fixes and performance improvements 2.7.3 Jan 11 •Improved layout when rotating between portrait and landscape
•Improved banner ad sizing for different screen widths
•General stability improvements 2.7.2 Jan 6 This update focuses on usability improvements and stability enhancements.
• Improved copy & paste behavior between calculators, including during and after calculations
• Refined repeated “=” operations to behave more like the iOS system calculator
• Improved display of long expressions so older parts are truncated naturally
• Fixed issues related to number input, sign toggle (+/−), and operator handling
• Enhanced layout stability when rotating the device or resizing the screen
• Improved support for locale-specific number formats (decimal and grouping separators)
• Various internal fixes to reduce crashes and calculation errors 2.7.1 Jan 6 Support URL and Marketing URL have been changed. 2.6.5 01/02/2023 Thank you for using our app. This version fixes the following items:
1) Solved the problem that the display collapses when the orientation of the smartphone is rotated.
2) Made other minor fixes. 2.6.4 11/27/2022 Thank you for usually using the App.
In this version, following items are revised.
1) Ad banner location was corrected.
2) App Icon was renewed. 2.6.3 11/24/2022 Thank you for using this App all the time.
This version fixes the following bugs.
1) Bug that number keys cannot be tapped under certain conditions
2) The screen collapses when the device is placed on a flat surface and the app is started.
3) Other minor fixes 2.6.2 10/26/2022 Thank you for using the app.
Also, thank you for the many warm comments and requests in the user reviews.
This time, the following improvements have been made.
1. Two calculators are always displayed regardless of the orientation of the smartphone. Due to the space on the screen, the calculators are arranged vertically in the case of the vertical screen.
2. Changed the color of the left and right arrow buttons to make it harder to press the wrong button.
3.Advertisements are displayed only on the vertical screen.
4. Other minor bug fixes 2.6.1 10/15/2022 Thank you for using the app.
Also, thank you for the many warm comments and requests in the user reviews.
This time, the following improvements have been made.
1. Two calculators are always displayed regardless of the orientation of the smartphone. Due to the space on the screen, the calculators are arranged vertically in the case of the vertical screen.
2. Changed the color of the left and right arrow buttons to make it harder to press the wrong button.
3.Advertisements are displayed only on the vertical screen.
4. Other minor bug fixes 2.6.0 10/13/2022 Small bug fix. 2.5.3 10/01/2022 Thank you for using our app.
Solved the issue that numeric keys cannot inputted after tapping the DEL key. 2.5.2 09/15/2022 Thank you for using it all the time.
Reviced point in this version:
・Press and hold the calculation result to copy it. You can use it by pasting it into Notepad, email, etc. 2.5.1 08/27/2022 Thank you for using our app.
The outline of this update is as follows.
1) Two calculators are always displayed on the horizontal screen when the app is started. You can use two calculators even if you set "Do not rotate the screen" in the settings.
2) Corrected so that calculation results, calculation formulas, and numeric keypad characters are displayed in the optimum size according to the size of the screen. 2.5.0 08/20/2022 Thank you for using our app.
This version, small bug has been fixed. 2.4.7 08/12/2022 Thank you for using this App.
In this version, the calculation method when tapping the % key has been improved.
For example, if you calculate 100-3%, subtract 3% of 100 from 100, and the result will be 97.
We will continue to reflect your opinions and requests in the future. Thank you for your cooperation. 2.4.6 08/05/2022 Thank you for using this App.
In this time, small bug has been fixed. 2.4.5 07/01/2022 Thank you for using this App.
In this time, small bug has been fixed. 2.4.4 06/29/2022 Thank you for using it.
Fixed a bug that characters are not displayed correctly 2.4.3 06/23/2022 Thank you for using App.
This time, we have improve the followings.
1) Enlarge the font size of each key and Calculation result.
2) Small bug fix 2.4.2 06/23/2022 Small bugs ware fixed. 2.4.1 06/22/2022 2.4.0 06/21/2022
version 2.7.4
posted on 2026-01-15
• Calculation formulas and results are now preserved even after closing the app
• Your previous calculations are restored when you reopen the app
• Improved stability and minor bug fixes
version 2.6.5
posted on 2023-01-02
Jan 2, 2023
Version 2.6.5
Support URL and Marketing URL have been changed.
Disclaimer
Official App Store Link
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