# Theorie 101 vs Rijsys

The clearest difference is in-app purchases: Rijsys at none against Theorie 101's 3. Rijsys also leads on update cadence (weekly vs every 6 weeks). Theorie 101's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Theorie 101 sells 3 one-off in-app purchases. Rijsys asks for nothing beyond the download.

Theorie 101 ships an update every 6 weeks, Rijsys weekly. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Theorie 101 | Rijsys |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 159 MB | 38 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ehsan Hoseini](https://appshunter.io/developer/1735316103) | [Lines4you](https://appshunter.io/developer/1896034832) |

## What reviewers say

### Theorie 101

[App page](https://appshunter.io/ios/app/theorie-101/id6767994405)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic CBR Theoriepakket | $0.99 | one-time |
| Deluxe CBR Theoriepakket | $0.99 | one-time |
| Pro CBR Theoriepakket | $0.99 | one-time |


### Rijsys

[App page](https://appshunter.io/ios/app/rijsys/id6784221985)

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

**In-app purchases:** none


## Frequently asked questions

### Is Theorie 101 free?

Theorie 101 is free to download, with in-app purchases available.

### Is Rijsys free?

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

### Do Theorie 101 or Rijsys have ads?

Neither Theorie 101 nor Rijsys shows ads.

### Which is updated more often, Theorie 101 or Rijsys?

Theorie 101 ships an update every 6 weeks, and Rijsys weekly. Most recently, Theorie 101 was updated on October 12, 2026 and Rijsys on October 5, 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.*