# Derivon vs Euclid Lab

The clearest difference is in-app purchases: Euclid Lab at none against Derivon's 5. Euclid Lab also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Derivon sells 5 in-app purchases, starting at $1.99 per month. Euclid Lab asks for nothing beyond the download.

Derivon ships an update every 5 days, Euclid Lab every 3 days. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Derivon | Euclid Lab |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 197 MB | 14 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ABT合同会社](https://appshunter.io/developer/6813846553) | [Yung-Hsin Shieh](https://appshunter.io/developer/6794223212) |

## What reviewers say

### 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 (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Derivon Super (Monthly) | $1.99 | per month |
| Derivon Super (Yearly) | $14.99 | per year |
| 5 Star Fragments | $0.99 | one-time |
| 12 Star Fragments | $1.99 | one-time |
| 32 Star Fragments | $3.99 | one-time |


### Euclid Lab

[App page](https://appshunter.io/ios/app/euclid-lab/id6801162141)

**Features:** Family Sharing, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Derivon free?

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

### Is Euclid Lab free?

Euclid Lab is free to download, with no in-app purchases.

### Do Derivon or Euclid Lab have ads?

Derivon shows ads; Euclid Lab does not.

### Which is updated more often, Derivon or Euclid Lab?

Derivon ships an update every 5 days, and Euclid Lab every 3 days. Most recently, Derivon was updated on October 24, 2026 and Euclid Lab on October 13, 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.*