AbacusRealistic Soroban

Learn the beads.
Build the skill.

A realistic Japanese abacus in your pocket, paired with a structured course that teaches number sense, calculation techniques, and mental math one movement at a time.

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Coming to iPhone and iPad

Slide real beadsSound, haptics, undo, redo, and focused practice.

17 levelsComplete course

Real SorobanTap or slide beads

Works offlineNo account or ads

One-time ProNo subscription

A course you can touch

See it. Move it. Understand it.

Lessons connect explanation, animated demonstration, guided bead movement, independent practice, and a short quiz.

Meet the Soroban

Learn the beam, rods, upper and lower beads, place value, and how a number takes shape.

Follow the movement

Replay demonstrations step by step, adjust speed, and use ghost beads while the technique is new.

Practice with purpose

Build numbers, recognize values, work through arithmetic, and use layered hints when needed.

Grow into mental math

Train speed, accuracy, Friends of 5 and 10, carrying, borrowing, daily challenges, and Flash Anzan.

Inside Abacus

Every step has a place to practice.

Abacus Soroban simulator — **A real abacus in your pocket**Use focused controls, bead sounds, and haptics.

Abacus learning course — **Learn from first principles**Progress through a complete 17-level curriculum.

Abacus guided lesson demonstration — **Watch every movement**Replay clear demonstrations at your pace.

Abacus Flash Anzan and practice modes — **Train mental calculation**Practice modes adapt from beginner to expert.

Abacus learning progress — **See progress clearly**Review lesson stars, streaks, skills, and achievements.

Built for learning

Serious practice without the noise.

Natural bead mechanics

Tap or slide beads, clear the frame, undo and redo movements, and switch supported frame styles.

Guided demonstrations

Move forward or backward through each technique and replay at a comfortable speed.

Focused practice

Number recognition, build-a-number, arithmetic, Speed Round, Daily Challenge, Custom Practice, and Flash Anzan.

Accessible controls

VoiceOver bead actions, Dynamic Type, Reduce Motion, high contrast, labels, icons, and haptics support different learners.

Local progress

Track mastery, accuracy, lesson progress, streaks, and achievements without creating an account.

Private by default

No analytics, advertising, tracking, backend, camera, microphone, photos, location, contacts, or notifications.

Your learning stays yours

Progress lives on your device.

Abacus works offline and collects no data. Apple handles the optional one-time Pro purchase and App Store update lookup. QnSub does not receive your lesson or practice history.

Coming soon

Put the abacus in your hands.

Abacus is being prepared for iPhone and iPad.

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