あかほん! プロトタイプA vs K
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!
K
Create and visualize 2D and 3D molecular models with intuitive drawing tools and AR capabilities. This app serves as a practical and cost-effective alternative to physical model kits for students.
- 2D structural formula drawing
- 3D molecular model visualization
- Augmented Reality (AR) viewing
- Save and reopen models
- Pre-built templates
- Screenshot capture
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**The Molecular Model App We Always Wanted** Born from the developer’s own learning experience, K-Mol is a molecular modeling app designed for high school and university students. ## Features ### 2D Mode ・Draw structural formulas with intuitive controls ・Supports up bonds and down bonds, making it possible to represent stereochemical structures ・Includes templates for five-membered and six-membered sugar rings, saving you from the tedious process of drawing them from scratch ### 3D Mode ・A 3D mode that feels like using a real molecular model kit ・A practical alternative to physical molecular model kits, which can be surprisingly expensive ・Recreates bond lengths and bond angles, making it useful for learning from the high school level through university-level chemistry ・viewing molecular models in AR ## Shared Features ・Screenshot: Capture the structural formulas and 3D models you create. Perfect for reports and study materials. ・Save: Save your structural formulas and 3D models inside the app and reopen them anytime. ・Templates: Frequently used structural formulas are available as templates, so you do not have to draw everything manually. ## Important Notes K-Mol is an educational app designed to help students learn about molecular structures, bonds, stereochemistry, and basic chemical visualization. It is not a substitute for textbooks, classroom instruction, laboratory safety guidance, or professional chemical analysis. The molecular structures, bond lengths, bond angles, aromatic representations, templates, and 2D/3D views shown in the app are simplified models for educational purposes. They do not fully represent actual chemical behavior, quantum effects, force-field optimization, experimentally measured structures, or other advanced chemical properties. Do not use this app for laboratory safety, medical, pharmaceutical, environmental, industrial, regulatory, research-level modeling, synthesis planning, handling of hazardous substances, or any other professional or safety-critical purpose. This app does not provide professional advice. The information displayed is intended for general educational purposes only.
Screenshots
Verdict
The clearest difference is price: あかほん! プロトタイプA at Free against K's $0.99. あかほん! プロトタイプA also leads on iOS requirement (7.0 vs 17.0). K's advantage is update cadence (every 2 weeks vs every 4 weeks). On 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
あかほん! プロトタイプA is free to download; K costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
あかほん! プロトタイプA ships an update every 4 weeks, K every 2 weeks. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.
| Parameter | あかほん! プロトタイプA | K |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 7.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 88 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Nobumitsu Shikine | Masaki Kobayashi |
Customer experience
あかほん! プロトタイプA
K
In-app purchases
あかほん! プロトタイプA
No in-app purchases
K
No in-app purchases









