# Straus Courier vs KF Босс

The clearest difference is update cadence: KF Босс at every 4 days against Straus Courier's fortnightly. KF Босс also leads on iOS requirement (10.0 vs 15.6). 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.

Straus Courier ships an update fortnightly, KF Босс every 4 days. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Straus Courier | KF Босс |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 44 MB | 5 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pistolgraph](https://appshunter.io/developer/1131299192) | [Mger Vardanian](https://appshunter.io/developer/1465787521) |

## What reviewers say

### Straus Courier

[App page](https://appshunter.io/ios/app/straus-courier/id1341044671)

**Features:** Vision Pro support

**In-app purchases:** none


### KF Босс

[App page](https://appshunter.io/ios/app/kf/id1567644433)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Straus Courier free?

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

### Is KF Босс free?

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

### Do Straus Courier or KF Босс have ads?

Neither Straus Courier nor KF Босс shows ads.

### Which is updated more often, Straus Courier or KF Босс?

Straus Courier ships an update fortnightly, and KF Босс every 4 days. Most recently, Straus Courier was updated on September 23, 2026 and KF Босс on September 13, 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.*