あかほん！ プロトタイプA vs Derivon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
あかほん！ プロトタイプA
This app uses a unique story-driven approach to help users learn calculus concepts like differentiation. Follow characters through engaging dialogues that explain complex math topics at your own pace.
- Story-driven learning
- Interactive dialogues
- Calculus concepts (differentiation)
- Character-based guidance
- NOVELICA system
- Self-paced learning
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勉強ともっと仲良くなれる学習支援アプリ あかほん！ あかほん！ プロトタイプA -微分・積分編- は愉快なキャラクターと一緒に数学の勉強をしていくショートストーリーが読めるアプリです。 勉強って自分との戦いだけれど、気を詰めすぎて疲れてしまう 一緒に勉強をしてくれる仲間がほしい そんなあなたにこのアプリはぴったりです！ -ストーリー- 主人公のシキネは偏差値18の高校3年生、このままでは受験に失敗すると悩んでいました。 そこで飛び級小学生と噂される小柄な女の子スウに数学を教えてもらうことにしました。 「飛び級でも小学生でもない」と最初は怒られてしまいますが、スウは優しいので勉強を教えてくれました。 スウは大好きな数学について語るのがとてもても楽しく、まんざらでもなかったのです。 シキネもわからないなりにスウの楽しげな話を聞いて、少しずつ理解を深めていきます。 今回の話題は微分。微分って一体何なんでしょうか？？ このアプリは新開発されたNOVELICAというシステムで動いています。 動画のように進みつつも、大事なところでは待ってくれたり、問いかけてくれます。 会話の聞き返しやスキップは動画よりも直感的。 自分のペースで2人の会話を楽しみながら、いつの間にか数学の知識が身についている、そんなアプリです。 2人との勉強をお楽しみください！
Derivon
Master calculus concepts like derivatives and integrals through daily, intuitive practice. Earn rewards, collect planets, and build streaks as you progress through challenges. Designed for quick, effective learning sessions.
- Daily calculus problem practice
- Earn Star Sand rewards
- Collect planets in Gallery
- Build and maintain daily streaks
- Rank-Up Challenges
- Shooting mode for breaks
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Master calculus through daily practice. Solve derivatives and integrals by intuition — no overthinking, just repetition. • Swipe through problems and build your skills • Earn Star Sand with every correct answer • Spin the Gacha to collect planets in your Gallery • Build a daily streak — never break the chain • Take Rank-Up Challenges as you progress • Play Shooting mode for a quick break • Track your streak, level up, and earn rewards Whether you're preparing for AP Calculus, university exams, or just sharpening your math skills, Derivon makes practice feel like a space adventure. 3 minutes a day. That's all it takes. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: あかほん！ プロトタイプA at 5.0 against Derivon's 3.0. あかほん！ プロトタイプA also leads on in-app purchases (none vs 3) and ads (none vs shown). Derivon's advantage is update cadence (every 4 days vs every 4 weeks). On price and ratings volume 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. Derivon sells 3 one-off in-app purchases. あかほん！ プロトタイプA asks for nothing beyond the download.
あかほん！ プロトタイプA holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
あかほん！ プロトタイプA ships an update every 4 weeks, Derivon every 4 days. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | あかほん！ プロトタイプA | Derivon |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 4 weeks | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 7.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 88 MB | 182 MB |
| Age rating | 4+ | 4+ |
| Developer | Nobumitsu Shikine | ABT合同会社 |
Customer experience
あかほん！ プロトタイプA
Derivon
In-app purchases
あかほん！ プロトタイプA
No in-app purchases
Derivon
- 5 Star Fragments$0.99
- 12 Star Fragments$1.99
- 32 Star Fragments$3.99
