# AX vs CA DSP

The clearest difference is rating: CA DSP at 5.0 against AX's 2.2. AX's advantage is ratings volume (5 vs 1). On price, update cadence, 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.

CA DSP holds the better App Store score, 5.0 against 2.2. That said, the two scores are not equally well evidenced: AX has 5 ratings behind it against 1, so its average is the more settled of the two.

AX ships an update every 2 months, CA DSP every 6 weeks. The most recent releases landed on September 7, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | AX | CA DSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (5 ratings)](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ca-dsp/id1563340670/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 10 MB | 18 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Metra Electronics Corp.](https://appshunter.io/developer/1133973919) | [文栋 顾](https://appshunter.io/developer/1460789214) |

## 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


### CA DSP

[App page](https://appshunter.io/ios/app/ca-dsp/id1563340670)

This utility app provides comprehensive control over audio settings, including EQ, crossovers, and time alignment. Configure all adjustments and DSP functionality remotely via smartphone, tablet, or PC.

**Highlights:** EQ adjustments, Controllable crossover settings, Digital time alignment, Grouping functionality, Preset and custom memory

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AX free?

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

### Is CA DSP free?

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

### Which has better reviews, AX or CA DSP?

CA DSP is rated higher. AX averages 2.2 out of 5 from 5 ratings, while CA DSP averages 5.0 from 1 ratings.

### Do AX or CA DSP have ads?

Neither AX nor CA DSP shows ads.

### Which is updated more often, AX or CA DSP?

AX ships an update every 2 months, and CA DSP every 6 weeks. Most recently, AX was updated on September 7, 2026 and CA DSP on July 7, 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.*