# Algebra I Quick Reference vs Differential Evolution

The clearest difference is price: Differential Evolution at Free against Algebra I Quick Reference's $0.99. Differential Evolution also leads on update cadence (daily vs every 36 months) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Differential Evolution is free to download; Algebra I Quick Reference costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Algebra I Quick Reference ships an update every 36 months, Differential Evolution daily. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Algebra I Quick Reference | Differential Evolution |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Daily** |
| Size | 4 MB | 33 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Jakub Sosna](https://appshunter.io/developer/1610607884) |

## What reviewers say

### Algebra I Quick Reference

[App page](https://appshunter.io/ios/app/algebra-i-quick-reference/id560359498)

**Features:** macOS Compatibility

**In-app purchases:** none


### Differential Evolution

[App page](https://appshunter.io/ios/app/differential-evolution/id1662013881)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Algebra I Quick Reference free?

Algebra I Quick Reference costs $0.99, with no in-app purchases.

### Is Differential Evolution free?

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

### Do Algebra I Quick Reference or Differential Evolution have ads?

Neither Algebra I Quick Reference nor Differential Evolution shows ads.

### Which is updated more often, Algebra I Quick Reference or Differential Evolution?

Algebra I Quick Reference ships an update every 36 months, and Differential Evolution daily. Most recently, Algebra I Quick Reference was updated on September 18, 2026 and Differential Evolution on September 9, 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.*