Abacus Support

Abacus is designed for iPhone and iPad on iOS or iPadOS 17 and later. The app supports portrait and landscape layouts and works offline for learning and practice.

Tap or slide a bead toward or away from the beam. Clear returns the frame to zero, while Undo and Redo step through recent movements. Focus mode gives the abacus more room.

Levels 1 through 3 are included, along with selected beginner practice in Number Recognition, Build a Number, and Addition. The included experience is enough to learn the basic frame and early techniques.

The one-time unlock opens levels 4 through 17, all practice modes, Flash Anzan, Speed Round, Daily Challenge, Custom Practice, the Suanpan, extra rod counts, all styles, and advanced statistics.

No. Abacus Pro Lifetime is a non-consumable, one-time App Store purchase. Apple shows the current price for your storefront before you buy.

Choose Restore Purchases from the paywall or Settings while using an Apple Account that has access to the purchase. Apple validates and restores the entitlement.

Demonstrations can be replayed step by step with previous, next, replay, and speed controls. Guided practice can show ghost beads. Independent practice offers three levels of help before revealing more of the solution.

Abacus supports adjustable VoiceOver bead actions, labeled controls, Dynamic Type, Reduce Motion, high contrast, dark appearance, and feedback that uses icons and text rather than color alone.

Open Settings, Data, then Reset to Factory. This removes local progress and preferences and returns to the introduction. A real purchase remains in Apple's purchase history and can be restored.

No. Abacus has no account, ads, analytics, tracking, or developer backend. Progress remains on the device. Read the privacy policy for details.