NBackCalc vs WAIS
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
WAIS
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An educational app for learning about the WAIS-4 adult intelligence test. Understand what each subtest measures, how to interpret scores, and how cognitive profiles relate to learning differences. Subtest explanations | Sample quiz questions | AI cognitive profile analysis | Cognitive trait insights For educational purposes only. Not a diagnostic tool. Current pricing and any applicable introductory offer are shown by the App Store for the signed-in account. Privacy Policy: https://horusuzu.github.io/wais4-privacy/ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: NBackCalc at every 2 days against WAIS's every 8 days. WAIS's advantage is iOS requirement (15.0 vs 17.0). On price, ads, 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 WAIS sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
NBackCalc ships an update every 2 days, WAIS every 8 days. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.
| Parameter | NBackCalc | WAIS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 8 days |
| Ads | No | No |
| 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 | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | YOSHINORI KONNO | Burning Tribe |
In-app purchases
NBackCalc
- 開発者を応援する$0.99
WAIS
- WAIS4 プレミアム14 Days trial$2.991 Month
