# AU Studio vs SL Tune

The clearest difference is rating: SL Tune at 5.0 against AU Studio's 4.5. SL Tune also leads on review sentiment (100% vs 67%) and update cadence (every 11 days vs monthly). AU Studio's advantage is ratings volume (4 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

AU Studio costs $9.99 and SL Tune $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SL Tune holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 67% of AU Studio's written reviews are positive against 100% of SL Tune's.

AU Studio ships an update monthly, SL Tune every 11 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | AU Studio | SL Tune |
| --- | --- | --- |
| Price | $9.99 | **$7.99** |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/au-studio/id6763809742/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sl-tune/id6797349071/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Paid | Paid |
| Size | 7 MB | 38 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Christian Thompson](https://appshunter.io/developer/1511795684) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### AU Studio

[App page](https://appshunter.io/ios/app/au-studio/id6763809742)

This app acts as a dedicated host for Audio Unit extensions, allowing musicians and developers to inspect, audition, and test installed audio plugins. It provides detailed information about each unit's capabilities and behavior without requiring a full digital audio workstation.

**Highlights:** Scan and catalog installed Audio Units, Filter plugins by developer, type, and status, Load AUv3 interfaces or use detailed inspector, Inspect registry identity, MIDI support, and parameters, Route CoreMIDI sources and audition audio effects, Monitor runtime CPU and memory usage, Built-in manual for guidance

**In-app purchases:** none


### SL Tune

[App page](https://appshunter.io/ios/app/sl-tune/id6797349071)

This app offers vocal pitch correction and tone effects for music production on iPhone and iPad. It allows precise control over vocal tuning, tone shaping, and echo, with various modes and presets for different vocal styles. The interface is adaptable for different screen orientations and host applications.

**Highlights:** Vocal pitch correction, Tone shaping effects, Adjustable echo, Key and scale selection, Natural and hard correction modes, Customizable presets, Resizable interface

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

**In-app purchases:** none


## Frequently asked questions

### Is AU Studio free?

AU Studio costs $9.99, with no in-app purchases.

### Is SL Tune free?

SL Tune costs $7.99, with no in-app purchases.

### Which has better reviews, AU Studio or SL Tune?

SL Tune is rated higher. AU Studio averages 4.5 out of 5 from 4 ratings, while SL Tune averages 5.0 from 1 ratings.

### Do AU Studio or SL Tune have ads?

Neither AU Studio nor SL Tune shows ads.

### Which is updated more often, AU Studio or SL Tune?

AU Studio ships an update monthly, and SL Tune every 11 days. Most recently, AU Studio was updated on November 5, 2026 and SL Tune on November 10, 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.*