Mugen Anzan 4+

mental arithmetic

Noriko Ueki

    • $1.99

iPhone Screenshots


(There is also a higher version, Mugen Anzan 2.)

The app is doing mental arithmetic. The screen changes automatically. You don't have to enter the answer. You are just watching.

Continue to subtract the number and continue to add the number. When it becomes less than 0, it changes to addition, and when it becomes larger than 100, it changes to subtraction.

Tap the number in the center to start the calculation. Add or subtract the number on the upper right to this number. When you can calculate and want to proceed quickly, tap the paw pad. (If you want to calculate at your own pace, set a longer time and tap the paw pad to proceed. )

The number on the upper right is fixed, but you can tap the number to change it randomly between 3 and 9.

What’s New

Version 1.1.0

Minor changes.

App Privacy

The developer, Noriko Ueki, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

Photo & Video