Soroban Path

Learn the Japanese abacus. Then do the math in your head.

A lesson where arrows show every bead move

The 34 complement formulas, with a star for each one mastered

A question about when a complement is needed, with the reason shown

The home screen with short lessons, one step at a time

A progress report with weekly goals and stars

How it works

Watch, then try

Each lesson starts with a short demonstration. Then guided beads show exactly where to move, so you learn the motions by doing them.

Meet the complements

When a sum does not fit on the beads, a complement steps in: the number that makes 5 or 10 together with it. Soroban Path teaches all 34 complement formulas, and when and why each one is needed.

Then do it in your head

Flash and listening practice turn the abacus into a picture in your mind, the way soroban students do mental math.

What is inside

46 short lessons in 10 units, from “Meet the Soroban” to “Mental Math & Flash”.
Four kinds of practice: Free Play, Soroban Sums, Flash Anzan and Listening Math.
Review that brings each complement formula back at just the right time.
Already know some abacus? Test out of a unit and skip ahead.
Certificates for finished units, and a progress report you can share.
Instructions can be read aloud, so learners who are still learning to read can follow along.
Works offline. Nothing to sign up for.

Free to start

The first 12 lessons and free play are free. Premium unlocks all 46 lessons and every practice level with a single one-time purchase. There is no subscription. Buying is handled by Apple.

Private by design

Progress stays on the device. There are no accounts, no ads and no tracking. Read the privacy policy, or get help.