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By Paul Christoph Grathwohl

This app is only available on the App Store for iOS devices.


Kopfnuss is an app that helps you train your brain in order to deal with all kinds of numbers.
Whether you're summing up your shopping bill, tipping appropriately at your local diner or deciphering roman numbers on historical buildings - soon everything appears to be as easy as 1+2=3.

★ Press and User opinions ★

"Well done! Elementary schools math in an enjoyable way."
5/5 - APPS&CO

"A well-made App for your entire family."
5/5 - Appsolutely

"Math game with a nicely done interface, that trains your mental arithmetic capabilities."
Grade: 2.1 - Macwelt

"At a mere 99 cents, Kopfnuss is a great bargain. The game is well-made, and it offers plenty of challenging gameplay that almost anyone would enjoy."
5/5 -

"I would highly recommend you buying this app."
5/5 - TheDolt's Blog

"Top! This app is just perfect!"

"What a great way to get one's couch potato brain of its couch."

"Well-thought-out, beautiful and challenging app."

"A fun, friendly app to keep your mind sharp, quick and flexible."

"Made with love."

"This incredibly well polished game has a beautiful simple interface and challenging gameplay."

★ Features ★


With Kopfnuss, you can practice basic arithmetics, the rule of three, percentage calculation, roman and square numbers and calculating basic sums of money.
Each exercise contains ten problems. Take your time solving them, there's no time limit. If you get one wrong, Kopfnuss will show you the correct answer and ask the same question later again.
Some exercises take approximations for an answer. These are identified by "≈" preceding the result. A 5% spread is perfect, a 10% spread is the permitted maximum.
You can choose the level of difficulty for all exercises. If hard is no more challenge to you, Kopfnuss will increase the level of difficulty. If your score withers, the problems get easier again.

➜ TIME TRIAL - Ready for a challenge?

Time: 90 seconds.
Math problems: one by one until you run out of time.
Rules: credits for correct and quick answers, if you answer incorrectly, points will be deducted.
Award: Highscore list entry and trophies on your own device. And you can publish your score on Facebook!


Share Kopfnuss with your family, your roommates, your best friend – the app provides user profiles for each and everyone.
Kopfnuss remembers the number of correct and false answers for everyone and their highscores and trophies respectively. To edit users or to add new people just tap the name on the start screen to enter the user management.


Kopfnuss remembers how many problems were solved right or wrong.
For every user, difficulty setting and kind of exercise. The gathered data is rendered into an attractive chart - combined or separated by exercises - that way you can review your progress from first use to the present day.

What's New in Version 1.1.0

- New exercise: Percentage calculation
- New exercise: Write roman numbers
- Approximate solutions for some exercises
- Additional time trial discipline
- New supported languages: French, Spanish

iPhone Screenshots

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Customer Reviews

Fun way to practice math

I am not gifted with numbers, but I have found this game to not only be a great way to review my basic math facts, but just a fun way to challenge myself. My kids (5 and 9) also enjoy this more than flash cards or verbal quizzes, but they usually only play it when I ask them to.

The best use I have made of it however, was when practicing basic multiplication with 3rd graders in a pull-out session at school. The three students I was working with were so excited to play an iTouch game at school and see how many points they could get in the multiplicaiton time trial setting. They were excitedly looking on shouting out answers to whomever was currently taking a turn.

Great app

You can say it's a game, how about game center compatibility?

View in iTunes
  • $0.99
  • Category: Education
  • Updated:
  • Version: 1.1.0
  • Size: 3.5 MB
  • Languages: English, French, German, Spanish
  • Seller:

Compatibility: Requires iOS 3.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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