Would you like to practice mental calculations? With an abacus, a sheet of paper or simply with your head, the application "Soroban mental calculation training" will help you on the simplest calculations to the most complex. The application "Soroban mental calculation training" offers you daily graphs and statistics to follow your progress. The application generates statistics in three categories: - Easy - Average - Difficult The application takes care of everything, the difficulties are managed automatically by the application according to the options you choose. Translated with www.DeepL.com/Translator (free version)