# Knock Messaging vs GreenBubbles Messages

The clearest difference is update cadence: Knock Messaging at every 5 days against GreenBubbles Messages's monthly. Knock Messaging also leads on iOS requirement (15.0 vs 26.1). 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.

Knock Messaging ships an update every 5 days, GreenBubbles Messages monthly. The most recent releases landed on September 19, 2026 and August 30, 2026 respectively.

## The numbers

| Metric | Knock Messaging | GreenBubbles Messages |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/greenbubbles-messages/id6760325589/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | — | Free |
| Size | 36 MB | 19 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Baseline Polls Limited Liability Company](https://appshunter.io/developer/1631404664) | [LVL35 LLC](https://appshunter.io/developer/1818124171) |

## 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


### GreenBubbles Messages

[App page](https://appshunter.io/ios/app/greenbubbles-messages/id6760325589)

This app allows you to access your Google Messages conversations on other devices. It offers full-featured messaging, instant push notifications, and a strong focus on privacy with end-to-end encryption. Setup is simple, requiring only a QR code scan.

**Highlights:** Sync Google Messages to other devices, Send/receive SMS, MMS, RCS, Supports photos, voice messages, group chats, Instant push notifications, End-to-end encrypted notifications, No account required, Easy QR code setup

**Features:** macOS Compatibility, Apple Watch app, 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 GreenBubbles Messages free?

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

### Do Knock Messaging or GreenBubbles Messages have ads?

Neither Knock Messaging nor GreenBubbles Messages shows ads.

### Which is updated more often, Knock Messaging or GreenBubbles Messages?

Knock Messaging ships an update every 5 days, and GreenBubbles Messages monthly. Most recently, Knock Messaging was updated on September 19, 2026 and GreenBubbles Messages on August 30, 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.*