iPhone Screenshots


This is a math calculating app to exercise your brain.
You enter numbers by hand-writing.

iOS 8.0 or later

What’s New

Version 1.0.1

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

New version :
- includes bug fix

App Privacy

The developer, ringsbell.net, 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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