# Pre vs Derivative

The clearest difference is price: Pre at Free against Derivative's $1.99. Derivative's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 31 months). On ads, device support and iOS requirement there is nothing between them.

Pre is free to download; Derivative costs $1.99 up front. Pre sells 1 in-app purchase, starting at $4.99 per month. Derivative asks for nothing beyond the download.

Pre ships an update every 31 months, Derivative monthly. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Pre | Derivative |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 31 months | **Monthly** |
| Size | 296 MB | 32 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Math Galaxy](https://appshunter.io/developer/500490521) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Pre

[App page](https://appshunter.io/ios/app/pre-algebra-fundamentals/id551027794)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PreAlgebra - Math Galaxy | $4.99 | per month |


### Derivative

[App page](https://appshunter.io/ios/app/derivative-calculus-pro/id1618965619)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pre free?

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

### Is Derivative free?

Derivative costs $1.99, with no in-app purchases.

### Do Pre or Derivative have ads?

Neither Pre nor Derivative shows ads.

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

Pre ships an update every 31 months, and Derivative monthly. Most recently, Pre was updated on October 24, 2026 and Derivative on October 11, 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.*