# GFA vs Knock

The clearest difference is iOS requirement: GFA at 13.0 against Knock's 15.0. 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.

## The numbers

| Metric | GFA | Knock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 165 MB | 31 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Sanmiwago](https://appshunter.io/developer/1747787232) | [SpikeWave (Pty) Ltd](https://appshunter.io/developer/6822832658) |

## What reviewers say

### GFA

[App page](https://appshunter.io/ios/app/gfa-chat/id6747211301)

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

**In-app purchases:** none


### Knock

[App page](https://appshunter.io/ios/app/knock-private-chat/id6805250807)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GFA free?

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

### Is Knock free?

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

### Do GFA or Knock have ads?

Neither GFA nor Knock shows ads.

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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.*