# Inkulus vs Derivon

The clearest difference is ads: Inkulus at none against Derivon's shown. Derivon's advantage is update cadence (every 4 days vs monthly). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Inkulus sells 3 in-app purchases, starting at $2.99 per 7 days and Derivon sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 3.0 for Inkulus against 3.0 for Derivon. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Inkulus ships an update monthly, Derivon every 4 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Inkulus | Derivon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/inkulus/id6760616214/reviews) | [3.0 (1 ratings)](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 4 MB | 182 MB |
| Requires iOS | 26 | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Teksum Development](https://appshunter.io/developer/1689891632) | [ABT合同会社](https://appshunter.io/developer/6813846553) |

## What reviewers say

### Inkulus

[App page](https://appshunter.io/ios/app/inkulus/id6760616214)

This app makes learning calculus engaging and effective through interactive tutorials, competitive gameplay, and real-time feedback. It allows users to actively solve problems, track progress, and develop a deeper understanding of mathematical concepts.

**Highlights:** Interactive calculus tutorials, Multiple game modes, 1v1 math battles, XP progression and statistics, Drawing canvas for touch/Apple Pencil, Active learning approach

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Inkulus Pro Weekly | $2.99 | per 7 days |
| Inkulus Pro Monthly | $7.99 | per month |
| Inkulus Pro Yearly | $69.99 | per year |


### 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 Inkulus free?

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

### Is Derivon free?

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

### Which has better reviews, Inkulus or Derivon?

Inkulus and Derivon are both rated 3.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Inkulus or Derivon have ads?

Derivon shows ads; Inkulus does not.

### Which is updated more often, Inkulus or Derivon?

Inkulus ships an update monthly, and Derivon every 4 days. Most recently, Inkulus was updated on October 3, 2026 and Derivon on October 7, 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.*