【iPad Soroban】

Supervised by the former abacus champion, Onodera 10th Dan.
Touch the same as a real abacus.
"GOHASAN" work also supports.
Reset button in the upper left.

・Video Guide(Sorry, Japanese only)
・Lesson(from beginner to 3rd grade)
・Examination(beginner & 10th grade)
・History
・Option(sound etc)