# Calculus Gacha！ vs Derivon

The clearest difference is ads: Calculus Gacha！ at none against Derivon's shown. Calculus Gacha！ also leads on device support (3 vs 1) and iOS requirement (13.0 vs 26.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Calculus Gacha！ sells 3 one-off in-app purchases and Derivon sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on August 16, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Calculus Gacha！ | Derivon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | — | Free with in-app purchases |
| Size | 81 MB | 130 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shunsuke Nakamura](https://appshunter.io/developer/1828229182) | [RYOMA MIZUTANI](https://appshunter.io/developer/1736955493) |

## What reviewers say

### Calculus Gacha！

[App page](https://appshunter.io/ios/app/calculus-gacha/id6753078774)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 不定方程式ガチャ利用オプション | $0.99 | one-time |
| AI Tutor Plus(500) | $2.99 | one-time |
| 履歴管理機能オプション | $2.99 | one-time |


### Derivon

[App page](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220)

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.

**Highlights:** Daily calculus problem practice, Earn Star Sand rewards, Collect planets in Gallery, Build and maintain daily streaks, Rank-Up Challenges, Shooting mode for breaks

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Star Fragments | $0.99 | one-time |
| 12 Star Fragments | $1.99 | one-time |
| 32 Star Fragments | $3.99 | one-time |


## Frequently asked questions

### Is Calculus Gacha！ free?

Calculus Gacha！ is free to download, with in-app purchases available.

### Is Derivon free?

Derivon is free to download, with in-app purchases available.

### Do Calculus Gacha！ or Derivon have ads?

Derivon shows ads; Calculus Gacha！ does not.

### Which is updated more often, Calculus Gacha！ or Derivon?

Calculus Gacha！ ships an update every 2 days, and Derivon every 2 days. Most recently, Calculus Gacha！ was updated on August 16, 2026 and Derivon on September 19, 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.*