Kopfrechnen DE 2.1

With this app, they can train their mental arithmetic skills, improve and compete with others.
The app has a single player and a multiplayer mode.

In single player modes there are 3 levels of difficulty and the following task types
Addition, Subtraction, Multiplication, Division, Mixed, Root, 2nd Potency, 3rd Potency, Miscellaneous Fractions, Linear Equations, Primes, Additons Subtraction Chain. Binary to Decimal, Hexadecimal to Decimal, Mixed All Operations, Basic Operations Chain, Mixed Basic Operations, Multiplication Division Chain and Complex Tasks.
For each category and task type, there is a separate high score on which they can compare with others.
There is a daily, monthly and eternal high score. The offline mode also allows an offline high score.
All results can be viewed after a run. So you see what you wrong and what was right.
In training mode the number range of the tasks can be set user-defined!
The highscore is available online: http://kopfrechnen.ctvnet.ch/

In multiplayer mode, you can search and duel your friends.
In doing so, they must alternately solve three tasks from a category chosen by them.
The response time is limited and there are 6 possible answers.
If you have more tasks after 6 rounds, you win the game.
There is a multiplayer ranking (http://kopfrechnen.ctvnet.ch/ranking/) who often wins gets points who loses, loses point. Who gives up loses automatically
App is App2sd (save on SD card) capable!

Planned for next version:
- Overall statistics for the multiplayer mode.