Abacus Lesson -ADD and SUB-3.1.9 - App Store
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Publisher Description
This is an app that you can learn addition and subtraction using an abacus.
An abacus is named "Soroban" in Japan. Do you know what an abacus is? The abacus is very simple calculator used in China, Japan, Korea and so on. Some people may say "Isn't it an unnecessary tool if you have a calculator such as a smartphone?". Answer would be "No".
The biggest difference between electric calculators and the abacus is whether you need to hold it in your hand when calculating. Because of its simplicity, you will be able to easily use the abacus in your mind.
Imagine that you can use calculations of about 3 digits in your life without physical tools.
This app will give you the skill of calculation.
Version History updated library. 3.1.9 01/16/2024 All contents can be used free of charge in this application.
Update : Fixed minor bugs. 3.1.5 02/04/2023 All contents can be used free of charge in this application.
Added the feature to check the previous calculation when re-challenge the wrong problem.
Added the feature to set sound effect on/off. Abacus operation sound and other sound effects can be set individually.
Improved operability. 3.1.0 03/16/2022 All content is free for this application, but since there was a request to remove advertisements, we added a feature to delete advertisements by purchasing as donate. 2.0.9 01/31/2022 Fixed minor bugs.
Improved operability of the abacus. 2.0.8 01/17/2022 Added notifications about new app releases.
Fixed an issue that beads would make a sound with just a touch. 2.0.7 12/21/2021 Added introduction of Division Lesson App.
Fixed typo. 2.0.5 11/05/2021 Updated libraries 2.0.3 09/22/2021 Updated libraries included in the app. 2.0.2 09/07/2021 Added a feature of playing move of abacus
Reviewed time attack rules
Added SE.
Added abacus digits
Fixed some bugs. 2.0.1 08/29/2021 Fixed retry wrong problem button in lesson7. 1.0.8 07/08/2021 No new feature.
Fixed SKAdNetworkItems. 1.0.7 03/17/2021 Added a feature to change abacus color in the setting menu. 1.0.6 03/10/2021 Updated libraries. 1.0.5 03/03/2021 Added authorization dialog for App Tracking. 1.0.4 02/24/2021 Supported English. 1.0.3 02/19/2021 1.0.2 02/13/2021 1.0.1 08/14/2020 1.0.0 08/10/2020
About Abacus Lesson -ADD and SUB-
The company that develops Abacus Lesson -ADD and SUB- is Hirokazu Komatsu. The latest version released by its developer is 3.1.9.
To install Abacus Lesson -ADD and SUB- 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 2026-10-15 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 Abacus Lesson -ADD and SUB- as malware if the download link is broken.
How to install Abacus Lesson -ADD and SUB- on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Abacus Lesson -ADD and SUB- 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 Abacus Lesson -ADD and SUB- 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 3.1.9
posted on 2026-10-15
Version History updated library. 3.1.9 01/16/2024 All contents can be used free of charge in this application.
Update : Fixed minor bugs. 3.1.5 02/04/2023 All contents can be used free of charge in this application.
Added the feature to check the previous calculation when re-challenge the wrong problem.
Added the feature to set sound effect on/off. Abacus operation sound and other sound effects can be set individually.
Improved operability. 3.1.0 03/16/2022 All content is free for this application, but since there was a request to remove advertisements, we added a feature to delete advertisements by purchasing as donate. 2.0.9 01/31/2022 Fixed minor bugs.
Improved operability of the abacus. 2.0.8 01/17/2022 Added notifications about new app releases.
Fixed an issue that beads would make a sound with just a touch. 2.0.7 12/21/2021 Added introduction of Division Lesson App.
Fixed typo. 2.0.5 11/05/2021 Updated libraries 2.0.3 09/22/2021 Updated libraries included in the app. 2.0.2 09/07/2021 Added a feature of playing move of abacus
Reviewed time attack rules
Added SE.
Added abacus digits
Fixed some bugs. 2.0.1 08/29/2021 Fixed retry wrong problem button in lesson7. 1.0.8 07/08/2021 No new feature.
Fixed SKAdNetworkItems. 1.0.7 03/17/2021 Added a feature to change abacus color in the setting menu. 1.0.6 03/10/2021 Updated libraries. 1.0.5 03/03/2021 Added authorization dialog for App Tracking. 1.0.4 02/24/2021 Supported English. 1.0.3 02/19/2021 1.0.2 02/13/2021 1.0.1 08/14/2020 1.0.0 08/10/2020
version 3.1.9
posted on 2024-01-16
updated library.
version 3.1.9
posted on 2024-01-16
Jan 16, 2024
Version 3.1.9
updated library.
version 3.1.5
posted on 2023-02-04
Feb 4, 2023
Version 3.1.5
All contents can be used free of charge in this application.
Update : Fixed minor bugs.
version 3.1.0
posted on 2022-03-16
Mar 16, 2022 Version 3.1.0
All contents can be used free of charge in this application.
Added the feature to check the previous calculation when re-challenge the wrong problem.
Added the feature to set sound effect on/off. Abacus operation sound and other sound effects can be set individually.
Improved operability.
version 2.0.9
posted on 2022-01-31
Jan 31, 2022 Version 2.0.9
All content is free for this application, but since there was a request to remove advertisements, we added a feature to delete advertisements by purchasing as donate.
version 2.0.8
posted on 2022-01-17
Jan 17, 2022 Version 2.0.8
Fixed minor bugs.
Improved operability of the abacus.
version 2.0.7
posted on 2021-12-21
Dec 21, 2021 Version 2.0.7
Added notifications about new app releases.
Fixed an issue that beads would make a sound with just a touch.
version 2.0.5
posted on 2021-11-05
Nov 5, 2021 Version 2.0.5
Added introduction of Division Lesson App.
Fixed typo.
Disclaimer
Official App Store Link
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