# Simplex vs Or Simplex Step

The clearest difference is iOS requirement: Or Simplex Step at 15.0 against Simplex's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Simplex sells 1 one-off in-app purchase and Or Simplex Step sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Simplex | Or Simplex Step |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Size | 5 MB | 45 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fernando Castillo](https://appshunter.io/developer/1787896193) | [Bohdan Bezpartochnyi](https://appshunter.io/developer/1850325090) |

## What reviewers say

### Simplex

[App page](https://appshunter.io/ios/app/simplex-linear-optimization/id6783993836)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simplex Premium | $1.99 | one-time |


### Or Simplex Step

[App page](https://appshunter.io/ios/app/or-simplex-step-by-step-solver/id6816232479)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OR Commented Pro | $2.99 | one-time |


## Frequently asked questions

### Is Simplex free?

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

### Is Or Simplex Step free?

Or Simplex Step is free to download, with in-app purchases available.

### Do Simplex or Or Simplex Step have ads?

Both Simplex and Or Simplex Step show ads.

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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.*