Comparison

フラッシュ暗算(公式) vs Mental Math

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

Mental Math

Sharpen your mental math skills with this engaging app focused on addition. Customize card numbers and timing intervals for a personalized learning experience. Track your progress with visually stimulating graphics, suitable for all ages.

Highlights
  • Customizable card numbers
  • Adjustable timing intervals
  • Focus on addition
  • Progress tracking
  • Engaging visuals
  • User-friendly interface
Features
Read full description

■ What is flash anzan? Flash anzan is a "soroban-style" (Japanese abacus) way to do mental math: numbers flash on the screen one after another, and you add them up in your head. No abacus experience needed — start at the beginner level and work your way up. ■ Who it's for • Kids and students who want faster arithmetic • Soroban / abacus learners practicing for tests • Adults who want a quick daily brain workout • Anyone looking for a habit they can actually keep ■ Certification-based ranks Question count, number of digits, and flash speed are designed around flash anzan certification standards. Begin at the entry grades, pass a promotion exam, and your rank goes up — from your first dan all the way to 20th dan. Your skill is shown clearly as a real rank. ■ See your progress • High score and daily scores tracked in charts • Switch between weekly, monthly, and all-time trends • A practice calendar makes your run visible ■ Stay motivated • Online ranking: compete with players worldwide, by week or all-time • Daily missions: see today's goals at a glance • Reminders: a gentle nudge at your practice time ■ Make it yours • "Practice" mode: pick your own level (digits, count, speed) with no pressure • "Challenge" mode: race the clock and test your limit • Toggle read-aloud and sound effects A few minutes of flash anzan a day turns calculation practice into a habit. Why not start with one round today? ■ Privacy Policy & Terms of Use Privacy Policy: https://takayukimeilyn.github.io/menuplanner/privacy-policy.html 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
Mental Math4 screens

Verdict

The call

The clearest difference is price: Mental Math at Free against フラッシュ暗算(公式)'s $3.99. Mental Math also leads on rating (4.3 vs 2.0) and update cadence (every 8 days vs every 15 months). フラッシュ暗算(公式)'s advantage is in-app purchases (none vs 3) 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

Mental Math is free to download; フラッシュ暗算(公式) costs $3.99 up front. Mental Math sells 3 in-app purchases, starting at $2.99 per month. フラッシュ暗算(公式) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mental Math holds the better App Store score, 4.3 against 2.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews complicate that: 57% of フラッシュ暗算(公式)'s written reviews are positive against 22% of Mental Math's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

フラッシュ暗算(公式) ships an update every 15 months, Mental Math every 8 days. The most recent releases landed on November 10, 2026 and November 8, 2026 respectively.

Scorecard8 real differences · 2 level
フラッシュ暗算(公式) versus Mental Math: the parameters behind the verdict, then further details
Parameterフラッシュ暗算(公式)Mental Math
Price$3.99Free — better
Rating2.0 (1 ratings)4.3 (4 ratings) — better
Positive reviews57.1% of reviews — better22.2% of reviews
Number of ratings14 — better
Update frequencyEvery 15 monthsEvery 8 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS7.0 — better17.2
Further details — not scored
Size2 MB56 MB
Age rating4+4+
DeveloperYuji MiyamotoTAKAYUKI HASHIMOTO

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%

Mental Math

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews18 reviews
Positive22.2%
Neutral0.0%
Negative77.8%

In-app purchases

None

フラッシュ暗算(公式)

No in-app purchases

3 purchases

Mental Math

Subscriptions2
  • 月間プラン7 Days trial$2.991 Month
  • 年間プラン7 Days trial$19.991 Year
One-time1
  • Lifetime Premium$39.99

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 Mental Math free?
Mental Math is free to download, with in-app purchases available.
Which has better reviews, フラッシュ暗算(公式) or Mental Math?
Mental Math is rated higher. フラッシュ暗算(公式) averages 2.0 out of 5 from 1 ratings, while Mental Math averages 4.3 from 4 ratings.
Do フラッシュ暗算(公式) or Mental Math have ads?
Mental Math 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 Mental Math?
フラッシュ暗算(公式) ships an update every 15 months, and Mental Math every 8 days. Most recently, フラッシュ暗算(公式) was updated on November 10, 2026 and Mental Math on November 8, 2026.

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