The Hardware
A Real Abacus That Sees Every Bead
The Undugu abacus is an authentic 15-rod Japanese abacus — with infrared sensors on every rod that detect each bead movement in real time and stream it to the learning app.
The Undugu abacus is an authentic 15-rod Japanese abacus — with infrared sensors on every rod that detect each bead movement in real time and stream it to the learning app.
A true 1:4 abacus layout — one heaven bead, four earth beads per rod, 15 rods. The bead action feels exactly like the abacus used in classrooms across Asia. No motors, no gimmicks: your hands do the math.
Every rod carries IR sensors that read the exact position of every bead, continuously. The device knows the number on the abacus at all times — so the app can verify each step of a calculation, not just the final answer.
Bluetooth pairing takes about 30 seconds. The abacus streams bead events to the Undugu app, which responds with lessons, games, voice guidance, and progress tracking in real time.
| Feature | Detail |
|---|---|
| Layout | 15-rod Japanese abacus, 1:4 bead system (75 beads) |
| Sensing | Infrared bead-position detection on every rod, real-time |
| Display | Built-in numeric display shows the current value |
| Connectivity | Bluetooth (BLE) and Wi-Fi |
| Power | Rechargeable battery, USB-C charging |
| Works with | iOS, Android, Windows, Mac, Chromebook |
| Offline use | Fully usable as a standard abacus with no app or power |
Math apps put another screen in front of your child. Undugu puts real beads in their hands. The screen only supports: it shows progress, plays the AI teacher's voice, and turns drills into games — while the actual learning happens through touch and movement.
Pre-order today, or join the waitlist for demo invitations and early-bird pricing.