With this app you will improve your counting skills. Different levels won't let you get bored, the simple interface is easy to use and saves battery power.
This app has:
* different levels of operations: addition (+), subtraction (-), multiplication (*), division (/) and their mixes;
* 3 different hard levels;
* stylish design;
* simple interface;
This app has not:
* paid content;
* unnecessary services;
* commercial advertisements;