Comparison

Flash Mental Math (Anzan) vs シンプルFLASH暗算

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Flash Mental Math (Anzan)

This app helps users of all ages improve their mental math and calculation speed. Numbers flash on screen briefly, training quick thinking and concentration. It's ideal for children preparing for abacus certification, students needing math test prep, or adults seeking brain training.

Highlights
  • Flash number display for quick thinking
  • Adjustable difficulty levels
  • Global and classroom rankings
  • No account registration required
  • Supports multiple languages
  • Intuitive interface for children
Features
Read full description

A flash anzan trainer built around precise timing. The numbers keep an exact rhythm and the sound lands with them, so even at high speed you can keep your mind on the calculation. THREE THINGS ABOUT THIS APP Precise display and sound The moment each number appears is worked out from the time since the start, on every frame, so the spacing never drifts however many numbers there are. The sound plays at the same moment the number changes. From 20 Kyu to 20 Dan, step by step You start with 2 one-digit numbers and work up as the count grows and the time shrinks. Test Mode puts you through the same 40 grades as the abacus, from 20 Kyu to 20 Dan. Ten questions, seven right to pass. Compete with your class Set the same Room ID and you see a ranking of just that room. A soroban class or a family can share one Room ID and keep practising against people they know. There is a global ranking too. MAIN FEATURES Stages 1 to 6 digits, 350 steps per digit, 2,100 in all. The count of numbers and the speed change little by little. Test Mode 40 grades from 20 Kyu to 20 Dan. Ten questions a round, seven right to pass. Grades you pass are recorded. From 20 Kyu to 17 Kyu the first number appears as abacus beads. Rankings Five rankings: stages cleared, test grade, attempts, login streak and total logins. Global and room, both. No account and no sign-in. You can change your display name and Room ID in the settings. Custom Mode (monthly plan) Choose the digits, the count of numbers, the seconds and how many questions run back to back. Digits 1 to 7, numbers 2 to 30, seconds in steps of 0.1, and 1 to 30 questions. Display settings Four text colours and two fonts. Light and dark modes. Login streak Counts the days you keep coming back, and the total. You can compare those in the rankings too. WHO IT IS FOR • People learning at a soroban class who want to practise flash anzan at home • People who want grades to aim at while they practise • Teachers who want their students practising on the same terms • Adults who want to work their head FREE AND THE MONTHLY PLAN All 2,100 stages, Test Mode and the rankings are free. The monthly plan removes the ads and unlocks Custom Mode. QUESTIONS Do I need an account? No. Open it and practise. A display name is given to you and you can change it in the settings. What age is it for? Once you can add numbers. It starts at 2 one-digit numbers in 4 seconds. Can a soroban class use it? Yes. Set the same Room ID and the ranking covers just that class. Can I practise multiplication or division? No. This app is addition only. LANGUAGES Japanese, English, Chinese (Simplified), Korean, Spanish, Portuguese, French, German and Italian. It follows the language of your device. Note: the Kyu and Dan grades in Test Mode are our own yardstick inside the app. They are not connected to any examining body. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

シンプルFLASH暗算

Features
Read full description

『シンプルFLASH暗算』は、画面に一瞬ずつ表示される数字を合計して答えるトレーニングアプリです。暗算力・注意力・ワーキングメモリの向上に役立ちます。UIはスマホ縦型に最適化。学習や脳トレ、受験対策にも。 ◆ 特長 ・一桁/二桁/三桁の難易度に対応 ・ステージモードで検定試験対策 ・表示口数(最大10口)/表示時間/消灯時間を自由に調整 ・効果音ON/OFF、ダーク/ライトのテーマ切替 ・ヒント表示で直前の出題を確認可能 ・オフラインでサクサク動作、すぐ再挑戦できるシンプル設計 ◆ 使い方 1. 「スタート」をタップして数字を順番に確認 2. 表示が終わったら合計を入力して「判定」 3. 正解・不正解が大きく表示され、ヒントで出題の内訳も確認できます ◆ こんな人におすすめ ・暗算を速く・正確にしたい ・通勤通学のスキマ時間に脳トレしたい ・受験・資格の計算力を底上げしたい ◆ プライバシー ・アカウント登録不要、個人情報の収集はありません ・設定は端末内に保存されます

Screenshots

Flash Mental Math (Anzan)4 screens
シンプルFLASH暗算3 screens

Verdict

The call

The clearest difference is in-app purchases: シンプルFLASH暗算 at none against Flash Mental Math (Anzan)'s 1. On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flash Mental Math (Anzan) sells 1 in-app purchase, starting at $0.99 per month. シンプルFLASH暗算 asks for nothing beyond the download.

UpkeepUpdate frequency

Flash Mental Math (Anzan) ships an update every 10 days, シンプルFLASH暗算 fortnightly. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

Scorecard1 real difference · 8 level
Flash Mental Math (Anzan) versus シンプルFLASH暗算: the parameters behind the verdict, then further details
ParameterFlash Mental Math (Anzan)シンプルFLASH暗算
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 10 days — betterFortnightly
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size54 MB4 MB
Age rating4+4+
DeveloperSIC Company LimitedTSUKASA YONAHA

In-app purchases

1 purchases

Flash Mental Math (Anzan)

Subscriptions1
  • Monthly Subscription$0.991 Month
None

シンプルFLASH暗算

No in-app purchases

Questions

Is Flash Mental Math (Anzan) free?
Flash Mental Math (Anzan) is free to download, with in-app purchases available.
Is シンプルFLASH暗算 free?
シンプルFLASH暗算 is free to download, with no in-app purchases.
Do Flash Mental Math (Anzan) or シンプルFLASH暗算 have ads?
Both Flash Mental Math (Anzan) and シンプルFLASH暗算 show ads.
Which is updated more often, Flash Mental Math (Anzan) or シンプルFLASH暗算?
Flash Mental Math (Anzan) ships an update every 10 days, and シンプルFLASH暗算 fortnightly. Most recently, Flash Mental Math (Anzan) was updated on October 7, 2026 and シンプルFLASH暗算 on October 18, 2026.

Other comparisons