# Derivon vs DELF Pass

The clearest difference is in-app purchases: DELF Pass at none against Derivon's 3. DELF Pass 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 3 one-off in-app purchases. DELF Pass asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on September 19, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Derivon | DELF Pass |
| --- | --- | --- |
| 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 2 days | Every 2 days |
| Monetization | Free with in-app purchases | — |
| Size | 130 MB | 40 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RYOMA MIZUTANI](https://appshunter.io/developer/1736955493) | [Indo Yoon](https://appshunter.io/developer/1866282692) |

## 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 (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 |


### DELF Pass

[App page](https://appshunter.io/ios/app/delf-pass/id6762107331)

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

**In-app purchases:** none


## Frequently asked questions

### Is Derivon free?

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

### Is DELF Pass free?

DELF Pass is free to download, with no in-app purchases.

### Do Derivon or DELF Pass have ads?

Derivon shows ads; DELF Pass does not.

### Which is updated more often, Derivon or DELF Pass?

Derivon ships an update every 2 days, and DELF Pass every 2 days. Most recently, Derivon was updated on September 19, 2026 and DELF Pass on May 17, 2026.

---

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