# CTOnline vs digi4school

The clearest difference is update cadence: CTOnline at every 9 days against digi4school's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CTOnline ships an update every 9 days, digi4school every 3 months. Both last shipped on September 8, 2026.

## The numbers

| Metric | CTOnline | digi4school |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 months |
| Size | 132 MB | 23 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BOS GmbH & Co KG](https://appshunter.io/developer/930379258) | ["Verein Schulbuch" zur Durchführung der Schulbuchaktion](https://appshunter.io/developer/1137097609) |

## What reviewers say

### CTOnline

[App page](https://appshunter.io/ios/app/ctonline/id930379259)

**Features:** macOS Compatibility

**In-app purchases:** none


### digi4school

[App page](https://appshunter.io/ios/app/digi4school/id1614250047)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CTOnline free?

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

### Is digi4school free?

digi4school is free to download, with no in-app purchases.

### Do CTOnline or digi4school have ads?

Neither CTOnline nor digi4school shows ads.

### Which is updated more often, CTOnline or digi4school?

CTOnline ships an update every 9 days, and digi4school every 3 months. Most recently, CTOnline was updated on September 8, 2026 and digi4school on September 8, 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.*