# CosSF vs Zonal Amber

The clearest difference is ads: CosSF at none against Zonal Amber's shown. CosSF also leads on update cadence (every 4 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CosSF ships an update every 4 days, Zonal Amber monthly. The most recent releases landed on September 9, 2026 and August 10, 2026 respectively.

## The numbers

| Metric | CosSF | Zonal Amber |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Monthly |
| Size | 7 MB | 16 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [丹 阳](https://appshunter.io/developer/1866301537) | [Nathaniel Nigeil Elzie](https://appshunter.io/developer/6781231998) |

## What reviewers say

### CosSF

[App page](https://appshunter.io/ios/app/cossf/id6757358458)

**Features:** macOS Compatibility

**In-app purchases:** none


### Zonal Amber

[App page](https://appshunter.io/ios/app/zonal-amber-flora-catalyst/id6784614356)

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

**In-app purchases:** none


## Frequently asked questions

### Is CosSF free?

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

### Is Zonal Amber free?

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

### Do CosSF or Zonal Amber have ads?

Zonal Amber shows ads; CosSF does not.

### Which is updated more often, CosSF or Zonal Amber?

CosSF ships an update every 4 days, and Zonal Amber monthly. Most recently, CosSF was updated on September 9, 2026 and Zonal Amber on August 10, 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.*