# O vs Mathora

The clearest difference is in-app purchases: Mathora at none against O's 2. Mathora also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. O sells 2 in-app purchases, starting at $0.99 per 3 months. Mathora asks for nothing beyond the download.

## The numbers

| Metric | O | Mathora |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 29 months | — |
| Size | 76 MB | 47 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Albert Mungochi](https://appshunter.io/developer/1724993311) | [Faisal Mahmood](https://appshunter.io/developer/6787498394) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-level-mathematics-revision/id6478979508)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Quarterly | $0.99 | per 3 months |
| Premium Annual | $2.99 | per year |


### Mathora

[App page](https://appshunter.io/ios/app/mathora-class-9-12-maths/id6806862021)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Mathora free?

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

### Do O or Mathora have ads?

O shows ads; Mathora does not.

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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.*