How many minutes do you have left when 139 of 1024 have already passed?
How much money do you need, if you want to buy 17 boxes for $13 each?
If you are older than 16 and need more than 5 seconds or even a pocket calculator for each of those tasks, you should train your mental arithmetic skills.
But it's not just about math. You also need dexterity to master the game.
128dot7 helps you, to playfully train your mental arithmetic skills. Play against the time and improve your skills step by step.
There are ten different levels of difficulty, to test and improve your current set of skills.

What’s New

Version 1.1

*** Please take a minute and write a review to help me to improve 128dot7. You rock. ***

Big thanks to all of you for the incredible support and the massive feedback!

In this update 128dot7’s 36 ÷ 9 difficulties got extended to 3 × 3 + 1 difficulties. These are now shorter and more individual and therefore perfect to play on the go. It’s never been easier and has never been so much fun to improve your mental arithmetic skills. Make your way through all ten difficulties and become a math genius.
Furthermore this version contains lots of bug fixes and wonderful new features. See for yourself!

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

Robsen333 ,

Best motivator to training your arithmetic skills

Usually I don't like to calculate. This app helps me a lot to start and train it. The different levels of difficulties are helping you to start right.


Milan Wittpohl
15.5 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Spanish

Age Rating
Rated 4+
© Milan Wittpohl 2015


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  • Family Sharing

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

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