# Osten Skill School vs Pie Matrix

The clearest difference is in-app purchases: Pie Matrix at none against Osten Skill School's 1. Pie Matrix also leads on device support (3 vs 1). Osten Skill School's advantage is ads (none vs shown). On price and iOS requirement there is nothing between them.

Both are free to download. Osten Skill School sells 1 one-off in-app purchase. Pie Matrix asks for nothing beyond the download.

## The numbers

| Metric | Osten Skill School | Pie Matrix |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | — |
| Size | 85 MB | 102 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [TagMango Inc](https://appshunter.io/developer/1611765353) | [Pie Matrix Innovations Private Limited](https://appshunter.io/developer/6775562989) |

## What reviewers say

### Osten Skill School

[App page](https://appshunter.io/ios/app/osten-skill-school/id6593675087)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Art of Decision Making | $9.99 | one-time |


### Pie Matrix

[App page](https://appshunter.io/ios/app/pie-matrix-sky-map/id6775562987)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Osten Skill School free?

Osten Skill School is free to download, with in-app purchases available.

### Is Pie Matrix free?

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

### Do Osten Skill School or Pie Matrix have ads?

Pie Matrix shows ads; Osten Skill School 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.*