Comparison

フラッシュ暗算(公式) vs Flash Mental Math (Anzan)

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

Head to head
About

フラッシュ暗算(公式)

Features
Read full description

多くの方からご要望を頂き、ついにiPhone版 フラッシュ暗算の登場です。 このアプリは、フラッシュ暗算考案者制作の日本フラッシュ暗算協会の公式ソフトです。 日本フラッシュ暗算協会は、日本国内で行われている全ての検定試験・競技大会・ギネスの公式ソフトを提供しています。 検定試験におきましては合格者が100万人を突破しました。 是非多くの方に、本物のフラッシュ暗算を体験していただきたいと思います。 機能 問題は、1桁2口3秒から3桁15口1.2秒までをレベル別に120段階で選択できるようにしました。 問題終了後、答えを入力すると正誤を音声で知らせます。 注意 最高レベル付近の問題では、機器の性能を超えたスピードになりますので、状況により表示にムラが出る場合があります。 今後、検定試験用・大会用・ゲーム用など、ご要望があれば制作をしたいと考えております。宜しくお願い致します。

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/

Screenshots

フラッシュ暗算(公式)4 screens
Flash Mental Math (Anzan)4 screens

Verdict

The call

The clearest difference is price: Flash Mental Math (Anzan) at Free against フラッシュ暗算(公式)'s $3.99. Flash Mental Math (Anzan) also leads on review sentiment (100% vs 57%) and rating (5.0 vs 2.0). フラッシュ暗算(公式)'s advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Flash Mental Math (Anzan) is free to download; フラッシュ暗算(公式) costs $3.99 up front. Flash Mental Math (Anzan) sells 1 in-app purchase, starting at $0.99 per month. フラッシュ暗算(公式) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Flash Mental Math (Anzan) holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 57% of フラッシュ暗算(公式)'s written reviews are positive against 100% of Flash Mental Math (Anzan)'s.

UpkeepUpdate frequency

フラッシュ暗算(公式) ships an update every 15 months, Flash Mental Math (Anzan) every 10 days. The most recent releases landed on November 10, 2026 and November 5, 2026 respectively.

Scorecard8 real differences · 2 level
フラッシュ暗算(公式) versus Flash Mental Math (Anzan): the parameters behind the verdict, then further details
Parameterフラッシュ暗算(公式)Flash Mental Math (Anzan)
Price$3.99Free — better
Rating2.0 (1 ratings)5.0 (3 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings13 — better
Update frequencyEvery 15 monthsEvery 10 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better15.0
Further details — not scored
Size2 MB54 MB
Age rating4+4+
DeveloperYuji MiyamotoSIC Company Limited

Customer experience

フラッシュ暗算(公式)

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews21 reviews
Positive57.1%
Neutral23.8%
Negative19.0%

Flash Mental Math (Anzan)

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

フラッシュ暗算(公式)

No in-app purchases

1 purchases

Flash Mental Math (Anzan)

Subscriptions1
  • Monthly Subscription$0.991 Month

Questions

Is フラッシュ暗算(公式) free?
フラッシュ暗算(公式) costs $3.99, with no in-app purchases.
Is Flash Mental Math (Anzan) free?
Flash Mental Math (Anzan) is free to download, with in-app purchases available.
Which has better reviews, フラッシュ暗算(公式) or Flash Mental Math (Anzan)?
Flash Mental Math (Anzan) is rated higher. フラッシュ暗算(公式) averages 2.0 out of 5 from 1 ratings, while Flash Mental Math (Anzan) averages 5.0 from 3 ratings.
Do フラッシュ暗算(公式) or Flash Mental Math (Anzan) have ads?
Flash Mental Math (Anzan) shows ads; フラッシュ暗算(公式) does not.
Which is updated more often, フラッシュ暗算(公式) or Flash Mental Math (Anzan)?
フラッシュ暗算(公式) ships an update every 15 months, and Flash Mental Math (Anzan) every 10 days. Most recently, フラッシュ暗算(公式) was updated on November 10, 2026 and Flash Mental Math (Anzan) on November 5, 2026.

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