This application program is an application program that single-mindedly solves the calculation.
They are 20 questions, and 100 questions.
Or, it repeats until failing.
It might be a thing to bring small happiness to your calculation life.
The problem set is only subtraction.
- July 13, 2011 New version 1.1
- August 02, 2011 Price decrease: $0.99 -> FREE!