Best abacus app. – Abacus' brain Review

Learned addition on abacus fast.
Review by chrozz on Abacus' brain.

All Abacus' brain Reviews

Other Reviews

Best abacus app.
chrozz

Excellent
sculptingman

Good addition exercises but needs subtraction, multiplication and division.
TS1001

Good, but I wish it had a couple more functions
Yoaz Shelef