# ztn Südwest vs CalfCloud

The clearest difference is update cadence: CalfCloud at monthly against ztn Südwest's every 10 months. CalfCloud also leads on iOS requirement (13.0 vs 15.0). 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.

ztn Südwest ships an update every 10 months, CalfCloud monthly. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ztn Südwest | CalfCloud |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Size | 29 MB | 14 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ZILAST GbR](https://appshunter.io/developer/1556208704) | [Förster-Technik GmbH](https://appshunter.io/developer/1062581884) |

## What reviewers say

### ztn Südwest

[App page](https://appshunter.io/ios/app/ztn-sudwest/id6740911301)

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

**In-app purchases:** none


### CalfCloud

[App page](https://appshunter.io/ios/app/calfcloud/id6740983204)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ztn Südwest free?

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

### Is CalfCloud free?

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

### Do ztn Südwest or CalfCloud have ads?

Neither ztn Südwest nor CalfCloud shows ads.

### Which is updated more often, ztn Südwest or CalfCloud?

ztn Südwest ships an update every 10 months, and CalfCloud monthly. Most recently, ztn Südwest was updated on October 5, 2026 and CalfCloud on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*