iPad Screenshots


Master addition and subtraction with math whizzes Robin and Dob.

• Developed by a Math Ph.D student for his own kids.
• Designed to provide kids the foundation they need for more advanced math.
• Guaranteed to be fun and effective.
• Includes a cool diploma to share with family and friends!

Special features:

• 10 levels for addition & bonus challenges.
• 10 levels for subtraction & bonus challenges.
• Unique, interactive tools.
• Automatic progress tracking for up to 4 customizable profiles.

"My daughter always thought math was boring until we came across Robin and Dob. Now she smiles while she's practicing her addition and subtraction." -- Marlis Zimmerman, Appracadabra

What’s New

Version 1.3

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

Fixed critical bug that crashed the app.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

EricWenntov ,

A great way to learn basic math

My two daughters love this app, especially the speed rounds. The helper tools (abacus, fingers, etc.) are a really nice touch for younger children. I like seeing my kids enjoying math!

App Privacy

The developer, Joris Weimar, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

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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