# KC ROCKS vs Rapid Fusion

The clearest difference is update cadence: Rapid Fusion at every 5 days against KC ROCKS's every 55 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.

KC ROCKS ships an update every 55 months, Rapid Fusion every 5 days. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | KC ROCKS | Rapid Fusion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rapid-fusion/id6479947725/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 55 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 3 MB | 181 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Wallace Christensen Broadcasting](https://appshunter.io/developer/1330721836) | [Josh Roll](https://appshunter.io/developer/1737617709) |

## What reviewers say

### KC ROCKS

[App page](https://appshunter.io/ios/app/kc-rocks/id1510026558)

**In-app purchases:** none


### Rapid Fusion

[App page](https://appshunter.io/ios/app/rapid-fusion/id6479947725)

Access easy-to-read lyrics for all albums from this artist. Quickly find the words to your favorite songs.

**Highlights:** Easy-to-read lyrics, All albums included, Artist-specific content, Quick lyric access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KC ROCKS free?

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

### Is Rapid Fusion free?

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

### Do KC ROCKS or Rapid Fusion have ads?

Neither KC ROCKS nor Rapid Fusion shows ads.

### Which is updated more often, KC ROCKS or Rapid Fusion?

KC ROCKS ships an update every 55 months, and Rapid Fusion every 5 days. Most recently, KC ROCKS was updated on October 27, 2026 and Rapid Fusion on October 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.*