# Audio Compressor vs UnderMB

The clearest difference is rating: UnderMB at 5.0 against Audio Compressor's 3.0. On price, ratings volume, update cadence and ads there is nothing between them.

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

UnderMB holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Audio Compressor ships an update weekly, UnderMB every 11 days. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Audio Compressor | UnderMB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/audio-compressor-mp3-reducer/id6748247625/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/undermb-file-size-compressor/id6811049521/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 11 days |
| Monetization | Ad-supported | — |
| Size | 55 MB | 9 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Suman Sharma](https://appshunter.io/developer/1815967200) | [CEMRE SIMSEK](https://appshunter.io/developer/6801148028) |

## What reviewers say

### Audio Compressor

[App page](https://appshunter.io/ios/app/audio-compressor-mp3-reducer/id6748247625)

Easily reduce the size of audio files like MP3, M4A, AAC, and WAV without sacrificing quality. This app offers batch processing, preview options, and various compression settings to save space and share audio faster.

**Highlights:** Compress multiple audio files, Preview before and after compression, Adjust compression level and bitrate, Apply fade in/out effects, Mono/Stereo conversion, Volume normalization, Batch processing

**In-app purchases:** none


### UnderMB

[App page](https://appshunter.io/ios/app/undermb-file-size-compressor/id6811049521)

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

**In-app purchases:** none


## Frequently asked questions

### Is Audio Compressor free?

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

### Is UnderMB free?

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

### Which has better reviews, Audio Compressor or UnderMB?

UnderMB is rated higher. Audio Compressor averages 3.0 out of 5 from 2 ratings, while UnderMB averages 5.0 from 1 ratings.

### Do Audio Compressor or UnderMB have ads?

Both Audio Compressor and UnderMB show ads.

### Which is updated more often, Audio Compressor or UnderMB?

Audio Compressor ships an update weekly, and UnderMB every 11 days. Most recently, Audio Compressor was updated on October 26, 2026 and UnderMB on October 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.*