# AX vs SixTen DSP Bluetooth Control

The clearest difference is update cadence: AX at every 2 months against SixTen DSP Bluetooth Control's every 9 months. AX also leads on iOS requirement (12.1 vs 15.0). SixTen DSP Bluetooth Control's advantage is review sentiment (11% vs 0%) and ratings volume (18 vs 5). On price, rating, 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.

SixTen DSP Bluetooth Control holds the better App Store score, 2.4 against 2.2. Both are backed by a comparable volume of ratings — 5 and 18 respectively. Written reviews point the same way: 0% of AX's written reviews are positive against 11% of SixTen DSP Bluetooth Control's.

AX ships an update every 2 months, SixTen DSP Bluetooth Control every 9 months. The most recent releases landed on October 3, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | AX | SixTen DSP Bluetooth Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (5 ratings)](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432/reviews) | **[2.4 (18 ratings)](https://appshunter.io/ios/app/sixten-dsp-bluetooth-control/id6743507284/reviews)** |
| Number of ratings | 5 | **18** |
| Positive reviews | 0.0% of reviews | **11.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 10 MB | 63 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Metra Electronics Corp.](https://appshunter.io/developer/1133973919) | [B2 AUDIO](https://appshunter.io/developer/1803253771) |

## What reviewers say

### AX

[App page](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432)

Enhance your car's audio system with this digital signal processor. It offers an all-in-one solution for various audio setups, allowing for improved sound quality and subwoofer integration while preserving factory features. Control settings easily via a smartphone app.

**Highlights:** Digital Signal Processor, Subwoofer integration, Preserves OE features, Bluetooth smartphone control, Vehicle-specific T-Harnesses (sold separately), All-in-one solution

**Features:** macOS Compatibility

**In-app purchases:** none


### SixTen DSP Bluetooth Control

[App page](https://appshunter.io/ios/app/sixten-dsp-bluetooth-control/id6743507284)

Fine-tune your car audio system with advanced sound customization via Bluetooth. Adjust crossovers, EQ, gain, and more for a perfect listening experience.

**Highlights:** Precision Crossover Adjustments, 31-Band Parametric EQ, Gain Control, Limiters & Delays, Polarity & Phase Control, Independent Left/Right Routing, Real-Time Monitoring, Save & Recall Presets

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AX free?

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

### Is SixTen DSP Bluetooth Control free?

SixTen DSP Bluetooth Control is free to download, with no in-app purchases.

### Which has better reviews, AX or SixTen DSP Bluetooth Control?

SixTen DSP Bluetooth Control is rated higher. AX averages 2.2 out of 5 from 5 ratings, while SixTen DSP Bluetooth Control averages 2.4 from 18 ratings.

### Do AX or SixTen DSP Bluetooth Control have ads?

Neither AX nor SixTen DSP Bluetooth Control shows ads.

### Which is updated more often, AX or SixTen DSP Bluetooth Control?

AX ships an update every 2 months, and SixTen DSP Bluetooth Control every 9 months. Most recently, AX was updated on October 3, 2026 and SixTen DSP Bluetooth Control on October 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.*