# Knock Messaging vs Rosetta Messenger

The clearest difference is device support: Knock Messaging at 3 against Rosetta Messenger's 1. Knock Messaging also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Knock Messaging ships an update every 5 days, Rosetta Messenger weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Knock Messaging | Rosetta Messenger |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Size | 36 MB | 74 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Baseline Polls Limited Liability Company](https://appshunter.io/developer/1631404664) | [Vilis Luse](https://appshunter.io/developer/1882781777) |

## What reviewers say

### Knock Messaging

[App page](https://appshunter.io/ios/app/knock-messaging/id6756548501)

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

**In-app purchases:** none


### Rosetta Messenger

[App page](https://appshunter.io/ios/app/rosetta-messenger/id6760127896)

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

**In-app purchases:** none


## Frequently asked questions

### Is Knock Messaging free?

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

### Is Rosetta Messenger free?

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

### Do Knock Messaging or Rosetta Messenger have ads?

Neither Knock Messaging nor Rosetta Messenger shows ads.

### Which is updated more often, Knock Messaging or Rosetta Messenger?

Knock Messaging ships an update every 5 days, and Rosetta Messenger weekly. Most recently, Knock Messaging was updated on October 25, 2026 and Rosetta Messenger on October 25, 2026.

---

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