Comparison

フラッシュ暗算(公式) vs drillio

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

drillio

Enhance your calculation abilities with engaging mental math exercises. This app offers customizable practice cards for addition, subtraction, multiplication, and division, along with progress tracking to keep you motivated.

Highlights
  • Mental math cards for calculation techniques
  • Customizable practice modes
  • Progress tracking via stats tab
  • Engaging brain-boosting exercises
  • Covers addition, subtraction, multiplication, division
Features
Read full description

drillio helps you build real mental math skills with soroban-style flash anzan and arithmetic drills. 41 flash anzan levels (from beginner to 20th dan) and 278 arithmetic lessons. All core learning is free. FLASH ANZAN - 41 levels: beginner, 20th kyu to 1st kyu, then 1st to 20th dan - Master a level by answering correctly 10 times, and earn a certificate - Frame-accurate display timing, so even the fastest flashes are shown precisely - Custom mode: choose your own digits, number of terms and display time - Your fastest answer is saved automatically ARITHMETIC DRILLS - 278 lessons in addition, subtraction, multiplication and division, from basic to advanced - 2-digit x 2-digit, 3-digit problems, fill-in-the-blank problems and more - Earn more points the faster you answer, and see your progress for each lesson CHALLENGES - Time Attack: solve as many problems as you can before time runs out - Oni Calc: answer the problem from N steps back, training memory and calculation together KEEP GOING - Daily streaks, study time and points - Reminders before your streak ends drillio PRO (optional) - No ads - Dark mode - Streak recovery - Priority support Subscriptions renew automatically unless cancelled. Terms of Use: https://gist.github.com/aviciida/c635fb7d61c24c8df4f39506902f3ca6 Privacy Policy: https://gist.github.com/aviciida/f9dd03234fa3de0b23aa536073abcca4

Screenshots

フラッシュ暗算(公式)4 screens
drillio4 screens

Verdict

The call

The clearest difference is price: drillio at Free against フラッシュ暗算(公式)'s $3.99. drillio also leads on rating (4.5 vs 2.0) and review sentiment (90% vs 57%). 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

drillio is free to download; フラッシュ暗算(公式) costs $3.99 up front. drillio sells 3 in-app purchases, starting at $1.99 per month. フラッシュ暗算(公式) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

drillio holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: drillio has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of フラッシュ暗算(公式)'s written reviews are positive against 90% of drillio's.

UpkeepUpdate frequency

フラッシュ暗算(公式) ships an update every 15 months, drillio every 2 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 2 level
フラッシュ暗算(公式) versus drillio: the parameters behind the verdict, then further details
Parameterフラッシュ暗算(公式)drillio
Price$3.99Free — better
Rating2.0 (1 ratings)4.5 (8 ratings) — better
Positive reviews57.1% of reviews90.0% of reviews — better
Number of ratings18 — better
Update frequencyEvery 15 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS7.0 — better16.0
Further details — not scored
Size2 MB33 MB
Age rating4+4+
DeveloperYuji MiyamotoRyo Iida

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%

drillio

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews20 reviews
Positive90.0%
Neutral0.0%
Negative10.0%

In-app purchases

None

フラッシュ暗算(公式)

No in-app purchases

3 purchases

drillio

Subscriptions3
  • drillio PRO Monthly$1.991 Month
  • drillio PRO campaign1 Year trial$14.991 Year
  • drillio PRO Annual$14.991 Year

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 drillio free?
drillio is free to download, with in-app purchases available.
Which has better reviews, フラッシュ暗算(公式) or drillio?
drillio is rated higher. フラッシュ暗算(公式) averages 2.0 out of 5 from 1 ratings, while drillio averages 4.5 from 8 ratings.
Do フラッシュ暗算(公式) or drillio have ads?
drillio 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 drillio?
フラッシュ暗算(公式) ships an update every 15 months, and drillio every 2 weeks. Most recently, フラッシュ暗算(公式) was updated on October 29, 2026 and drillio on October 30, 2026.

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