3n or Not vs 数学図鑑
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
3n or Not
Test your quick thinking with this educational game. It challenges you to rapidly identify if a given number is divisible by three. Perfect for practicing mental math skills.
- Quick number discrimination
- Multiple of 3 identification
- Mental math practice
- Educational game
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3n or Not is a game to quickly discrimination whether that number is a multiple of 3 or not.
数学図鑑
This app uses animations and dynamic visuals to explain complex high school math concepts. It aims to make abstract ideas intuitive and engaging for students and educators alike. Explore calculus, geometry, and equations through visual learning.
- Animated explanations of math concepts
- Dynamic visual representations
- Covers calculus, geometry, and equations
- Intuitive understanding of abstract ideas
- Aids students and educators
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【数学図鑑 - ビジュアルで学ぶ数学】 数学の美しさと面白さを、アニメーションで体験しましょう！ 「数学図鑑」は、高校数学の重要概念を、直感的に理解できるようにデザインされた学習アプリです。微分積分、図形、方程式など、幅広い分野の数学的事象を、アニメーションや動く図形で表現。数式だけでは想像しにくい概念も、目で見て納得できます！ 【こんな人におすすめ】 ・数学が苦手だけど、何とか克服したい人 ・数学の面白さをもっと知りたい人 ・ビジュアルで数学を理解したい人 ・数学の本質的な理解を目指す学生 ・数学教育に力を入れている教師の方 数学は、私たちの世界を形作る「言葉」です。数学をビジュアルの力でわかりやすく紹介する「数学図鑑」を使って、数学の美しい世界を体験してみませんか。きっとあなたの知的好奇心が刺激され、数学の新しい魅力に気付くはずです。ダウンロードは今すぐ！ ※本アプリは、数学の重要概念を直感的に理解するための補助教材です。体系的な学習のためには、適切な教科書や問題集と併用することをおすすめします。
Screenshots
Verdict
The clearest difference is in-app purchases: 3n or Not at none against 数学図鑑's 2. 3n or Not also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.0). 数学図鑑's advantage is update cadence (every 2 weeks vs every 4 months). On price, review sentiment and ads 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. 数学図鑑 sells 2 one-off in-app purchases. 3n or Not asks for nothing beyond the download.
3n or Not ships an update every 4 months, 数学図鑑 every 2 weeks. Both last shipped on October 8, 2026.
| Parameter | 3n or Not | 数学図鑑 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 95.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 13 MB | 149 MB |
| Age rating | 4+ | 4+ |
| Developer | Ninicode | Keisuke Minami |
Customer experience
3n or Not
数学図鑑
In-app purchases
3n or Not
No in-app purchases
数学図鑑
- 広告の削除$1.99
- 広告の削除+開発者への支援$2.99
