NBackCalc vs RecallBloom
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NBackCalc
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NBackCalcは、認知科学で実証されたNバック課題をベースにした計算トレーニングアプリです。 【NBackとは？】 N個前の計算問題の答えを記憶しながら、新しい計算問題を解く二重課題です。「覚える」と「計算する」を同時に行うことで、ワーキングメモリ（作業記憶）を効率よく鍛えられます。 【特徴】 ・1〜10バックまで対応。自分のレベルに合わせて調整可能 ・加算・減算・乗算・除算から使用する演算を自由に選択 ・制限時間・問題数をカスタマイズ ・広告なし・完全無料 【こんな人におすすめ】 ・マルチタスクが苦手な人 ・あたふたしてしまいがちな人 ・物忘れが多いと感じている人
RecallBloom
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RecallBloom is a clean and distraction-free Dual N-Back training app designed to improve your working memory, concentration, and cognitive performance. Features: • Scientifically inspired Dual N-Back training • Simple and intuitive interface • Adjustable difficulty levels • Track your progress over time • Daily brain training sessions • Fast, lightweight, and easy to use Whether you're looking to sharpen your focus, improve memory, or challenge your brain, RecallBloom provides an effective and enjoyable cognitive training experience. Train consistently and watch your performance grow.
Screenshots
Verdict
The clearest difference is ads: NBackCalc at none against RecallBloom's shown. NBackCalc also leads on update cadence (every 2 days vs fortnightly). RecallBloom's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases 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
Both are free to download. NBackCalc sells 1 one-off in-app purchase and RecallBloom sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
NBackCalc ships an update every 2 days, RecallBloom fortnightly. The most recent releases landed on October 1, 2026 and October 10, 2026 respectively.
| Parameter | NBackCalc | RecallBloom |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Fortnightly |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | YOSHINORI KONNO | HIROYUKI YOKOKURA |
In-app purchases
NBackCalc
- 開発者を応援する$0.99
RecallBloom
- Remove ads$4.99
