# COS vs YellowFleetApp

COS and YellowFleetApp are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | COS | YellowFleetApp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 115 MB | 25 MB |
| Requires iOS | **15.8** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [COS Gesellschaft fuer Computersysteme Organisation und Softwareentwicklung mbH](https://appshunter.io/developer/1530903772) | [YellowFox GmbH](https://appshunter.io/developer/555280895) |

## What reviewers say

### COS

[App page](https://appshunter.io/ios/app/cos-avisierung/id1532861735)

**Features:** macOS Compatibility

**In-app purchases:** none


### YellowFleetApp

[App page](https://appshunter.io/ios/app/yellowfleetapp/id1619922012)

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

**In-app purchases:** none


## Frequently asked questions

### Is COS free?

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

### Is YellowFleetApp free?

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

### Do COS or YellowFleetApp have ads?

Neither COS nor YellowFleetApp shows ads.

### Which is updated more often, COS or YellowFleetApp?

COS ships an update every 2 months, and YellowFleetApp every 2 months. Most recently, COS was updated on October 21, 2026 and YellowFleetApp on October 25, 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.*