Soroban Kingdom — soroban practice for children
Practise the Japanese soroban (abacus) and mental arithmetic from 20th Kyu to 10th Dan, on any phone, tablet or computer. When your child gets one wrong, the app shows the bead move that most likely went wrong, worked out from the answer. Levels 20–16 are free forever — no sign-up.
▶ Start practicing (levels 20–16 free forever)
🧪 Open beta: every level from 20th Kyu to 10th Dan, plus games, tests and worksheets, is open with no sign-up and no charge. Paid plans are paused; we will announce it in advance before they start again.
Play and try
- 🗺 Flash Anzan Adventure — bring the town's lights back with Solomon. No sign-up, always free.
- ⚡ Flash Anzan Challenge — one minute, no sign-up. Find out your level from 20th Kyu to 10th Dan.
For parents and teachers
- 🏠 For families — using Soroban Kingdom at home (open beta: no sign-up, no charge).
- 🏫 For abacus schools — the teacher screen, pricing and the Founding Partner offer.
- 📋 Key facts — features, levels, pricing and how data is handled, on one page.
- ⚖️ Legal, privacy and terms
Learn about the soroban
- 📖 Soroban questions, answered — what age to start, what the research says, learning at home, and more.
- ✋ Finger movement — thumb and index finger, and when to use each.
- 🖐 Friends of 5 and 10 — carrying and borrowing, with bead diagrams.
- 📘 What each level looks like — digits and terms from 20th Kyu to 1st Kyu.
- 🏅 The SK Test — our own mock test, with a printable certificate.
Soroban Kingdom is an independent practice app made in Japan. It is not affiliated with any abacus examination body or franchise.