# ROCK ATTACK vs FM 81

The clearest difference is ads: ROCK ATTACK at none against FM 81's shown. ROCK ATTACK also leads on device support (5 vs 3). FM 81's advantage is update cadence (every 7 months vs every 41 months). On price, in-app purchases and iOS requirement there is nothing between them.

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

ROCK ATTACK ships an update every 41 months, FM 81 every 7 months. The most recent releases landed on October 6, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | ROCK ATTACK | FM 81 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Every 7 months** |
| Size | 83 MB | 87 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple TV, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Jerome Maziere](https://appshunter.io/developer/1492288188) | [100%Radio](https://appshunter.io/developer/1136591921) |

## What reviewers say

### ROCK ATTACK

[App page](https://appshunter.io/ios/app/rock-attack/id1492288189)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### FM 81

[App page](https://appshunter.io/ios/app/fm-81/id6748903291)

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

**In-app purchases:** none


## Frequently asked questions

### Is ROCK ATTACK free?

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

### Is FM 81 free?

FM 81 is free to download, with no in-app purchases.

### Do ROCK ATTACK or FM 81 have ads?

FM 81 shows ads; ROCK ATTACK does not.

### Which is updated more often, ROCK ATTACK or FM 81?

ROCK ATTACK ships an update every 41 months, and FM 81 every 7 months. Most recently, ROCK ATTACK was updated on October 6, 2026 and FM 81 on September 29, 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.*