# TB Compressor vs AU3FX

The clearest difference is update cadence: TB Compressor at every 2 months against AU3FX's every 6 months. AU3FX's advantage is price ($4.99 vs $8.99) and review sentiment (100% vs 82%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

TB Compressor costs $8.99 and AU3FX $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AU3FX holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 24 and 14 respectively. Written reviews point the same way: 82% of TB Compressor's written reviews are positive against 100% of AU3FX's.

TB Compressor ships an update every 2 months, AU3FX every 6 months. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | TB Compressor | AU3FX |
| --- | --- | --- |
| Price | $8.99 | **$4.99** |
| Rating | [4.8 (24 ratings)](https://appshunter.io/ios/app/tb-compressor/id1517791397/reviews) | **[5.0 (14 ratings)](https://appshunter.io/ios/app/au3fxspace/id1540779621/reviews)** |
| Number of ratings | **24** | 14 |
| Positive reviews | 82.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Paid | Paid |
| Size | 11 MB | 2 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ToneBoosters](https://appshunter.io/developer/1472446500) | [Kymatica AB](https://appshunter.io/developer/522046659) |

## What reviewers say

### TB Compressor

[App page](https://appshunter.io/ios/app/tb-compressor/id1517791397)

This professional audio plugin offers mastering-grade compression and dynamics processing for iOS devices. It features advanced controls like soft knee, parallel, upward/downward, and band-limited compression, with real-time visual feedback and an interactive interface.

**Highlights:** Mastering-grade compression, Upward and downward compression, External side-chain input, Band-limited and spatially selective compression, Real-time interactive display, Audition function for compressor and side chain, Integrated spectrum analyzer

**In-app purchases:** none


### AU3FX

[App page](https://appshunter.io/ios/app/au3fxspace/id1540779621)

This professional audio effect plugin offers high-quality real-time reverb for iOS devices. It allows for extensive parameter tweaking to create a vast range of sonic spaces, from intimate rooms to infinite expanses. The app includes built-in presets and filters, with full external control and session saving capabilities.

**Highlights:** High quality 32-bit DSP engine, Extensive parameter tweaking, Built-in resonant filters, Bundled presets, Multiple instances, Save/load session state, External parameter control

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TB Compressor free?

TB Compressor costs $8.99, with no in-app purchases.

### Is AU3FX free?

AU3FX costs $4.99, with no in-app purchases.

### Which has better reviews, TB Compressor or AU3FX?

AU3FX is rated higher. TB Compressor averages 4.8 out of 5 from 24 ratings, while AU3FX averages 5.0 from 14 ratings.

### Do TB Compressor or AU3FX have ads?

Neither TB Compressor nor AU3FX shows ads.

### Which is updated more often, TB Compressor or AU3FX?

TB Compressor ships an update every 2 months, and AU3FX every 6 months. Most recently, TB Compressor was updated on September 23, 2026 and AU3FX on September 21, 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.*