App profile · Education · Data updated 2026-10-03

百Math - Calculation App -

by naoya saito · Free · Version 3.2.0

Availability On the App Store since July 2021

百Math - Calculation App - is made and published by naoya saito. AppBrain is an independent app data site and isn't affiliated with naoya saito. The app name, icon, screenshots and description belong to naoya saito and are shown as published on the App Store.

About 百Math - Calculation App -

百Math - Calculation App - is an education app developed by naoya saito.

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App Information

百Math - Calculation App - is freely available from the App Store. The app size is 18.15 MB. The latest version available is 3.2.0. The last update was on September 21, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since July 2021.

Description by naoya saito (from the App Store)

When did you last do mental math without reaching for your phone?

百Math was built by an engineer who realized he had become too dependent on calculators and AI to do even simple arithmetic. This app is his answer — and maybe yours too.

Trusted by users for 5 years, 百Math is a no-frills 100-problem calculation trainer. Solve all 100 as fast as you can, track your progress, and compete on the global leaderboard.

【Key Features】
・4 Modes: Addition, Subtraction, Multiplication, and Division
・Schulte Table — a visual search game that sharpens your peripheral vision and focus
・Gorbov Table — an advanced Schulte Table rule where you alternate between ascending red numbers and descending black numbers
・Flash Calculation — a new mode that trains your instant recall
・Ghost Race — compete against your personal best
・Heatmap to spot your weak spots
・Clean, distraction-free design
・Global ranking system
・Streak counter, average time, and time chart to track improvement
・Home screen widget for quick access

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Price	Free
Rating	No ratings
Ranking	Not ranked
Version	3.2.0
App size	18.1 MB
Suitable for	Everyone

Screenshots

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Screenshots by naoya saito, from the the App Store listing

Official page on the App Store

Alternatives to 百Math - Calculation App -

Changelog of 百Math - Calculation App -

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Developer information for naoya saito

naoya saito

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