# Hazelnote vs Campus Köthen

The clearest difference is in-app purchases: Campus Köthen at none against Hazelnote's 4. Hazelnote's advantage is update cadence (every 5 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Hazelnote sells 4 in-app purchases, starting at $4.99 per 7 days. Campus Köthen asks for nothing beyond the download.

Hazelnote ships an update every 5 days, Campus Köthen monthly. Both last shipped on October 31, 2026.

## The numbers

| Metric | Hazelnote | Campus Köthen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Size | 79 MB | 35 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Horize](https://appshunter.io/developer/1797319015) | [Erik Engler](https://appshunter.io/developer/6804716582) |

## What reviewers say

### Hazelnote

[App page](https://appshunter.io/ios/app/hazelnote-ai-study-notes/id6757763746)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hazelnote Weekly | $4.99 | per 7 days |
| Hazelnote Monthly | $9.99 | per month |
| Hazelnote Annual | $49.99 | per year |
| Hazelnote Annual | $49.99 | per year |


### Campus Köthen

[App page](https://appshunter.io/ios/app/campus-kothen/id6805886837)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hazelnote free?

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

### Is Campus Köthen free?

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

### Do Hazelnote or Campus Köthen have ads?

Neither Hazelnote nor Campus Köthen shows ads.

### Which is updated more often, Hazelnote or Campus Köthen?

Hazelnote ships an update every 5 days, and Campus Köthen monthly. Most recently, Hazelnote was updated on October 31, 2026 and Campus Köthen on October 31, 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.*