Comparison

N'Back Fan vs 19×19 暗算脳トレ

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

Head to head
About

N'Back Fan

Features
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Improve Sensory Memory & Working Memory using N'Back. Tap the number key matches the one from N steps earlier in the sequence. In 1'Back 1 task1: count & memorize 2 task2: count & memorize 3 __keyboard__: answer for task1 4 task3: count & memorize 5 __keyboard__: answer for task2 6 task4: count & memorize : In 2'Back 1 task1: count & memorize 2 task2: count & memorize 3 task3: count & memorize 4 __keyboard__: answer for task1 5 task4: count & memorize 6 __keyboard__: answer for task2 7 task5: count & memorize : [details] https://app.brain-workout.org/nbackfan-e/

About

19×19 暗算脳トレ

Features
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19×19 暗算脳トレは、11×11〜19×19の二桁掛け算を楽しくマスターできるトレーニングアプリです。 【特徴】 ・ステージ制トレーニング 段ごとに問題を出題。正解を重ねると習熟度が上がり、新しいステージが解放されます。 ・タイムアタックモード 60秒で何問解けるか挑戦!新記録を目指してスコアを伸ばしましょう。 ・二乗トレーニング 11×11, 12×12…19×19を順番に出題。二乗の答えを素早く覚えられます。 ・苦手克服モード 間違えやすい問題を重点的に出題。弱点を効率よく克服できます。 ・成長の記録 正答率・連続日数・平均回答時間をグラフで確認。毎日の進捗が一目でわかります。 【こんな方におすすめ】 ・暗算力を鍛えたい方 ・計算が速くなりたい学生 ・脳トレを習慣にしたい方 ・子どもの算数学習をサポートしたい保護者 毎日少しずつ続けることで、二桁掛け算がスラスラ解けるようになります!

Screenshots

N'Back Fan4 screens
19×19 暗算脳トレ3 screens

Verdict

The call

The clearest difference is in-app purchases: 19×19 暗算脳トレ at none against N'Back Fan's 1. 19×19 暗算脳トレ also leads on update cadence (every 9 days vs every 9 months) and iOS requirement (13.0 vs 15.6). On price, 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. N'Back Fan sells 1 one-off in-app purchase. 19×19 暗算脳トレ asks for nothing beyond the download.

UpkeepUpdate frequency

N'Back Fan ships an update every 9 months, 19×19 暗算脳トレ every 9 days. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 3 level
N'Back Fan versus 19×19 暗算脳トレ: the parameters behind the verdict, then further details
ParameterN'Back Fan19×19 暗算脳トレ
PriceFreeFree
Update frequencyEvery 9 monthsEvery 9 days — better
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size7 MB38 MB
Age rating4+4+
DeveloperYasuyoshi OtaAtsushi Isai

In-app purchases

1 purchases

N'Back Fan

One-time1
  • remove ads and extend to 12$1.99
None

19×19 暗算脳トレ

No in-app purchases

Questions

Is N'Back Fan free?
N'Back Fan is free to download, with in-app purchases available.
Is 19×19 暗算脳トレ free?
19×19 暗算脳トレ is free to download, with no in-app purchases.
Do N'Back Fan or 19×19 暗算脳トレ have ads?
Both N'Back Fan and 19×19 暗算脳トレ show ads.
Which is updated more often, N'Back Fan or 19×19 暗算脳トレ?
N'Back Fan ships an update every 9 months, and 19×19 暗算脳トレ every 9 days. Most recently, N'Back Fan was updated on September 30, 2026 and 19×19 暗算脳トレ on October 7, 2026.

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