# Ultimate Car Audio App vs SixTen DSP Bluetooth Control

The clearest difference is review sentiment: Ultimate Car Audio App at 82% against SixTen DSP Bluetooth Control's 11%. Ultimate Car Audio App also leads on rating (4.3 vs 2.4) and update cadence (every 3 days vs every 9 months). SixTen DSP Bluetooth Control's advantage is in-app purchases (none vs 6). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ultimate Car Audio App sells 6 one-off in-app purchases. SixTen DSP Bluetooth Control asks for nothing beyond the download.

Ultimate Car Audio App holds the better App Store score, 4.3 against 2.4. Both are backed by a comparable volume of ratings — 86 and 18 respectively. Written reviews point the same way: 82% of Ultimate Car Audio App's written reviews are positive against 11% of SixTen DSP Bluetooth Control's.

Ultimate Car Audio App ships an update every 3 days, SixTen DSP Bluetooth Control every 9 months. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Ultimate Car Audio App | SixTen DSP Bluetooth Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (86 ratings)](https://appshunter.io/ios/app/ultimate-car-audio-app/id1052058556/reviews)** | [2.4 (18 ratings)](https://appshunter.io/ios/app/sixten-dsp-bluetooth-control/id6743507284/reviews) |
| Number of ratings | **86** | 18 |
| Positive reviews | **82.3% of reviews** | 11.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 74 MB | 63 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Thomas VanSlambrouck](https://appshunter.io/developer/1051372112) | [B2 AUDIO](https://appshunter.io/developer/1803253771) |

## What reviewers say

### Ultimate Car Audio App

[App page](https://appshunter.io/ios/app/ultimate-car-audio-app/id1052058556)

This comprehensive toolkit assists car audio enthusiasts and professionals in designing enclosures, wiring speakers, and finding local shops. It offers various calculators, databases, and learning resources to enhance audio system setup and tuning.

**Highlights:** Box enclosure design calculator, Speaker wiring impedance calculator, Subwoofer and amplifier databases, Car audio shop directory, Tone generators for tuning, Educational tutorials and FAQs

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bronze | $1.99 | one-time |
| UCAA Pro Legacy | $2.99 | one-time |
| UCAA Pro | $4.99 | one-time |
| Silver | $4.99 | one-time |
| Gold | $9.99 | one-time |
| Diamond | $19.99 | one-time |

**What reviewers like**

- 👍 Great for DIY car audio
- 👍 Excellent for beginners and pros
- 👍 Must-have for bass heads
- 👍 Best box building app
- 👍 Accurate box calculations

**What reviewers complain about**

- 👎 Ads on purchased app
- 👎 Limited sub brands in database
- 👎 Cut sheet lacks port wall info for slot ports
- 👎 3D box feature is pointless
- 👎 Electrical calculations inaccurate

**Reported bugs**

- Ads appearing after purchase
- No sound for tone burst or sweep
- App stopped working
- Cutout sheet not available
- No preview for box design

**Requested features**

- Remove ads from purchased app
- Add more sub brands to the database
- Include port wall info on cut sheets for slot ports
- Improve 3D box feature
- Fix inaccurate electrical calculations


### 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 Ultimate Car Audio App free?

Ultimate Car Audio App is free to download, with in-app purchases available.

### Is SixTen DSP Bluetooth Control free?

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

### Which has better reviews, Ultimate Car Audio App or SixTen DSP Bluetooth Control?

Ultimate Car Audio App is rated higher. Ultimate Car Audio App averages 4.3 out of 5 from 86 ratings, while SixTen DSP Bluetooth Control averages 2.4 from 18 ratings.

### Do Ultimate Car Audio App or SixTen DSP Bluetooth Control have ads?

Neither Ultimate Car Audio App nor SixTen DSP Bluetooth Control shows ads.

### Which is updated more often, Ultimate Car Audio App or SixTen DSP Bluetooth Control?

Ultimate Car Audio App ships an update every 3 days, and SixTen DSP Bluetooth Control every 9 months. Most recently, Ultimate Car Audio App was updated on October 29, 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.*