# ACFM vs Knockdog

The clearest difference is update cadence: ACFM at daily against Knockdog's every 3 months. 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.

ACFM ships an update daily, Knockdog every 3 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ACFM | Knockdog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 months |
| Size | 47 MB | 35 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Busan International Film Festival](https://appshunter.io/developer/702674458) | [eunhee gwak](https://appshunter.io/developer/1744130117) |

## What reviewers say

### ACFM

[App page](https://appshunter.io/ios/app/acfm/id1537064219)

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

**In-app purchases:** none


### Knockdog

[App page](https://appshunter.io/ios/app/knockdog/id6754978978)

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

**In-app purchases:** none


## Frequently asked questions

### Is ACFM free?

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

### Is Knockdog free?

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

### Do ACFM or Knockdog have ads?

Neither ACFM nor Knockdog shows ads.

### Which is updated more often, ACFM or Knockdog?

ACFM ships an update daily, and Knockdog every 3 months. Most recently, ACFM was updated on November 3, 2026 and Knockdog 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.*