Simple soroban app for android description: This application is a simple japanese abacus (soroban ).
It has a free mode where you can use the abacus freely and a challenge mode with 4 operations (addition subtraction one and two digit multiplication and division) and 3 difficulty levels (easy medium hard) where you must race against the clock to perform calculations.
Contains tutorials for: basic concepts addition subtraction one digit multiplication two digit multiplicationalso has a custom challenge mode where you can set the number of questions type of questions and difficulty.
(This is just a hobby project i 39 m doing for fun.
This app is free and doesn 39 t have in app purchases or ads).
