# AC vs Big Stuff Harmonic Distortion

The clearest difference is review sentiment: Big Stuff Harmonic Distortion at 100% against AC's 0%. AC's advantage is monetization model (free vs ad-supported) and iOS requirement (11.0 vs 15). On price, update cadence, ads and in-app purchases there is nothing between them.

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

AC ships an update every 29 months, Big Stuff Harmonic Distortion every 40 months. The most recent releases landed on October 12, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | AC | Big Stuff Harmonic Distortion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (12 ratings)](https://appshunter.io/ios/app/big-stuff-harmonic-distortion/id6449679430/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 29 months** | Every 40 months |
| Monetization | **Free** | Ad-supported |
| Size | 14 MB | 30 MB |
| Requires iOS | **11.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roland Corporation](https://appshunter.io/developer/387333694) | [Nembrini Audio](https://appshunter.io/developer/1493296895) |

## What reviewers say

### AC

[App page](https://appshunter.io/ios/app/ac-22lx-editor/id1660536656)

Control your BOSS AC-22LX Acoustic Guitar Amplifier with this dedicated editor. Connect via Bluetooth® to adjust amplifier functions and settings directly from your iPhone or iPad.

**Highlights:** Bluetooth connectivity, Amplifier function control, Dedicated editor, iPhone/iPad compatible

**In-app purchases:** none


### Big Stuff Harmonic Distortion

[App page](https://appshunter.io/ios/app/big-stuff-harmonic-distortion/id6449679430)

This app emulates the sound of a legendary vintage distortion pedal, offering a violin-like sustaining tone. It functions as a standalone application, an AudioUnit v3 effect, or an Inter-App Audio effect for versatile music production.

**Highlights:** Vintage distortion emulation, Sustaining violin-like tone, Standalone app functionality, AudioUnit v3 effect, Inter-App Audio effect

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AC free?

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

### Is Big Stuff Harmonic Distortion free?

Big Stuff Harmonic Distortion is free to download, with no in-app purchases.

### Do AC or Big Stuff Harmonic Distortion have ads?

Neither AC nor Big Stuff Harmonic Distortion shows ads.

### Which is updated more often, AC or Big Stuff Harmonic Distortion?

AC ships an update every 29 months, and Big Stuff Harmonic Distortion every 40 months. Most recently, AC was updated on October 12, 2026 and Big Stuff Harmonic Distortion on October 18, 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.*