鬼計算 vs N
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
鬼計算
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【鬼計算】 計算問題をといて遊ぶ、計算ゲームアプリ！ 小学生でも楽しめるレベル1から大人でも苦戦するレベル鬼まで。 むずかしい問題もなんどもちょうせんしてクリアしよう！ 【使い方】 遊びたいモードとレベルをせんたくして問題をといていこう。 まちがえちゃうとHPがへっちゃう！ HPがなくなるまえに10問といてクリアしよう。 【機能一覧】 ・たす、ひく、かける、わるの四則演算をクイズ形式で出題 ・レベル1〜3、鬼を実装 ・シェアボタン
N
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I wanted to play "Oni Keisan" on my iPhone! That's why I created this N-Back brain training app. What is this training? Solve calculations while remembering the answers from a few questions back. Juggling "memorizing" and "calculating" at the same time gives your brain a real workout. Features ◆ Two Input Modes - Tap Mode: Quickly tap the answer - Handwriting Mode: Write numbers directly ◆ Build Daily Habits - Set daily play goals - Track your streak - Record how you're feeling today ◆ Track Your Progress - Accuracy trends - Level-up history - Play history ◆ Customize Your Way - Adjust question count & time limits - 3 color themes - iPhone & iPad support Perfect For - Those who want to play Oni Keisan without a dedicated game console - Anyone looking for a quick mental exercise - People who want to build a daily habit Just 5 minutes a day. A casual brain training experience.
Screenshots
Verdict
The clearest difference is in-app purchases: 鬼計算 at none against N's 1. 鬼計算 also leads on iOS requirement (15.2 vs 26.0). N's advantage is update cadence (every 4 days vs every 5 months). 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
Both are free to download. N sells 1 in-app purchase, starting at $0.99 per month. 鬼計算 asks for nothing beyond the download.
鬼計算 ships an update every 5 months, N every 4 days. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.
| Parameter | 鬼計算 | N |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 12 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | masaaki genno | chunson yamada |
In-app purchases
鬼計算
No in-app purchases
N
- １ヶ月プラン$0.991 Month
