This is application of brain training.
You calculate two numbers next to each other and answer the ones digit.

You can train your brain by calculating earnestly.

This application has two modes.

1. Number of questions : Compete for the time that you calculate the number of questions.
2. Time limit : Compete for the number of questions that you can calculate in time limit.
*In each mode,you can select addition or subtraction or multiplication.
(When a value is minus,you answer the absolute value.)

What’s New

Version 1.0

This app has been updated by Apple to use the latest Apple signing certificate.

App Privacy

The developer, Satoshi Nagamine, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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