# Rotor Engine vs Flow Audio Compressor

The clearest difference is iOS requirement: Rotor Engine at 10.0 against Flow Audio Compressor's 18.1. 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 | Rotor Engine | Flow Audio Compressor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 6 MB | 29 MB |
| Requires iOS | **10.0** | 18.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hublot SA](https://appshunter.io/developer/396904336) | [KEAT MEN TANG](https://appshunter.io/developer/1886302384) |

## What reviewers say

### Rotor Engine

[App page](https://appshunter.io/ios/app/rotor-engine/id1498187557)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flow Audio Compressor

[App page](https://appshunter.io/ios/app/flow-audio-compressor/id6781218478)

**In-app purchases:** none


## Frequently asked questions

### Is Rotor Engine free?

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

### Is Flow Audio Compressor free?

Flow Audio Compressor is free to download, with no in-app purchases.

### Do Rotor Engine or Flow Audio Compressor have ads?

Neither Rotor Engine nor Flow Audio Compressor 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.*