# Pre vs Simultaneous Equations

The clearest difference is price: Pre at Free against Simultaneous Equations's $1.99. Pre also leads on device support (3 vs 1). Simultaneous Equations's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.0). On update cadence and ads there is nothing between them.

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

Pre ships an update every 31 months, Simultaneous Equations every 36 months. The most recent releases landed on September 15, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Pre | Simultaneous Equations |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 31 months** | Every 36 months |
| Monetization | — | Paid |
| Size | 296 MB | 50 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Math Galaxy](https://appshunter.io/developer/500490521) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## 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 |


### Simultaneous Equations

[App page](https://appshunter.io/ios/app/simultaneous-equations/id731495724)

This interactive tool helps students visualize and understand simultaneous equations. It demonstrates graphical, substitution, and elimination methods for solving them, with a quiz to test comprehension and lessons on real-world applications.

**Highlights:** Graphical representation of equations, Substitution method demonstration, Elimination method demonstration, Interactive equation definition, Quiz for understanding assessment, Illustrated lessons with real-world examples

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pre free?

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

### Is Simultaneous Equations free?

Simultaneous Equations costs $1.99, with no in-app purchases.

### Do Pre or Simultaneous Equations have ads?

Neither Pre nor Simultaneous Equations shows ads.

### Which is updated more often, Pre or Simultaneous Equations?

Pre ships an update every 31 months, and Simultaneous Equations every 36 months. Most recently, Pre was updated on September 15, 2026 and Simultaneous Equations on September 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.*