# あかほん！ プロトタイプA vs 極限ガチャ

The clearest difference is price: あかほん！ プロトタイプA at Free against 極限ガチャ's $5.99. あかほん！ プロトタイプA also leads on iOS requirement (7.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

あかほん！ プロトタイプA is free to download; 極限ガチャ costs $5.99 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, 極限ガチャ every 3 weeks. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | あかほん！ プロトタイプA | 極限ガチャ |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/a/id1438322285/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 88 MB | 14 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nobumitsu Shikine](https://appshunter.io/developer/1361521847) | [Akira Hiraoka](https://appshunter.io/developer/1668714727) |

## What reviewers say

### あかほん！ プロトタイプA

[App page](https://appshunter.io/ios/app/a/id1438322285)

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.

**Highlights:** Story-driven learning, Interactive dialogues, Calculus concepts (differentiation), Character-based guidance, NOVELICA system, Self-paced learning

**Features:** macOS Compatibility

**In-app purchases:** none


### 極限ガチャ

[App page](https://appshunter.io/ios/app/id6467179754)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is あかほん！ プロトタイプA free?

あかほん！ プロトタイプA is free to download, with no in-app purchases.

### Is 極限ガチャ free?

極限ガチャ costs $5.99, with no in-app purchases.

### Do あかほん！ プロトタイプA or 極限ガチャ have ads?

Neither あかほん！ プロトタイプA nor 極限ガチャ shows ads.

### Which is updated more often, あかほん！ プロトタイプA or 極限ガチャ?

あかほん！ プロトタイプA ships an update every 4 weeks, and 極限ガチャ every 3 weeks. Most recently, あかほん！ プロトタイプA was updated on October 8, 2026 and 極限ガチャ on October 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*