Fast100Math vs MathGrid 100
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fast100Math
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Have Fun Training Your Brain with the 100-Masu Calculation App! A simple yet profound app that everyone can enjoy! Improve your calculation skills while customizing your experience to match your style. ■Flexible Calculation Modes Supports addition, subtraction, and multiplication from single-digit to double-digit numbers. Choose your preferred difficulty, from 25 to 100 grids! ■Compete on the Global Leaderboard Challenge users worldwide and compete for the highest score! Aim for the top with your 10 × 10 records. ■Various Input Methods Supports voice and handwriting inputs. Choose the method that suits you best. ■Customizable Appearance Personalize your app by adjusting background colors, text colors, and fonts. Create your very own design and enjoy! ■Accessibility Features With VoiceOver support, you can solve math problems using audio assistance without relying on visuals. Step into the world of brain training! Boost your scores with 100-Masu calculations and aim for the top of the global leaderboard. Experience the joy of improving your calculation skills today!
MathGrid 100
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MathGrid 100 — Photo-graded math drills for daily mental math practice. Known in Japan as "Hyakumasu Keisan" (百マス計算 / 100-square calculation), this classic drill is a proven method for building mental math fluency, recommended by Japanese educators such as Hideo Kageyama. MathGrid 100 brings this method to your iPhone with AI-powered photo grading: just snap a picture of the completed worksheet and get an instant score. 【Features】 * Camera-based instant grading — no typing required * Supports addition and multiplication * 9×9 (multiplication) and 10×10 grids * Review and manually edit each cell if needed * Saves up to 20 sessions in history * Points, levels, and badges to keep kids motivated * Daily streak tracking * Up to 4 separate child profiles with individual progress 【Great for】 * Parents tired of manually grading drill sheets * Tracking your child's daily practice * Gamifying repetitive practice to keep kids engaged * Supplementing Kumon, abacus class, or other math curricula ※ Internet connection required (handwriting recognition runs in the cloud). ※ This app shows a persistent banner ad and an interstitial ad after every few gradings.
Screenshots
Verdict
The clearest difference is ads: Fast100Math at none against MathGrid 100's shown. Fast100Math also leads on update cadence (every 3 days vs every 3 weeks). MathGrid 100's advantage is iOS requirement (15.1 vs 18.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fast100Math ships an update every 3 days, MathGrid 100 every 3 weeks. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.
| Parameter | Fast100Math | MathGrid 100 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 31 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | makoto amijima | Hiroyuki Ishikawa |
In-app purchases
Fast100Math
No in-app purchases
MathGrid 100
No in-app purchases
