# Derivative vs Xygos

The clearest difference is in-app purchases: Derivative at none against Xygos's 1. Derivative also leads on iOS requirement (15.1 vs 17.0). Xygos's advantage is ads (none vs shown) and update cadence (weekly vs monthly). On price and device support there is nothing between them.

Both are free to download. Xygos sells 1 in-app purchase, starting at $2.99 per 7 days. Derivative asks for nothing beyond the download.

Derivative ships an update monthly, Xygos weekly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Derivative | Xygos |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (39 ratings)](https://appshunter.io/ios/app/xygos-math-in-motion/id6451348655/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | — | 88.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 101 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) | [Xygos LLC](https://appshunter.io/developer/1671065233) |

## What reviewers say

### Derivative

[App page](https://appshunter.io/ios/app/derivative-calculus/id1618969952)

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

**In-app purchases:** none


### Xygos

[App page](https://appshunter.io/ios/app/xygos-math-in-motion/id6451348655)

Learn math interactively by solving problems directly on-screen with intuitive gestures. This app offers step-by-step solutions and real-time feedback for algebra and calculus, cutting learning time in half.

**Highlights:** Gesture-based problem solving, Step-by-step solutions, Real-time feedback and hints, Covers Calculus 1 and Algebra, Adaptive learning, Supports various math subjects

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Xygos Infinity | $2.99 | per 7 days |


## Frequently asked questions

### Is Derivative free?

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

### Is Xygos free?

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

### Do Derivative or Xygos have ads?

Derivative shows ads; Xygos does not.

### Which is updated more often, Derivative or Xygos?

Derivative ships an update monthly, and Xygos weekly. Most recently, Derivative was updated on October 27, 2026 and Xygos on October 24, 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.*