# AX vs CA AMP

The clearest difference is rating: CA AMP at 4.0 against AX's 2.2. CA AMP also leads on review sentiment (33% vs 0%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CA AMP holds the better App Store score, 4.0 against 2.2. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews point the same way: 0% of AX's written reviews are positive against 33% of CA AMP's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | AX | CA AMP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (5 ratings)](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432/reviews) | **[4.0 (6 ratings)](https://appshunter.io/ios/app/ca-amp/id1554205982/reviews)** |
| Number of ratings | 5 | **6** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 10 MB | 20 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| 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 AMP

[App page](https://appshunter.io/ios/app/ca-amp/id1554205982)

This application provides comprehensive control and adjustments for amplifiers, including EQ, crossover settings, and digital time alignment. Manage all audio signal processing functions directly from your smartphone or tablet.

**Highlights:** Interactive audio signal processor, EQ adjustments, Controllable crossover (6/12/24/48 dB), Digital time alignment, Grouping functionality, Preset and custom settings 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 AMP free?

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

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

CA AMP is rated higher. AX averages 2.2 out of 5 from 5 ratings, while CA AMP averages 4.0 from 6 ratings.

### Do AX or CA AMP have ads?

Neither AX nor CA AMP shows ads.

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

AX ships an update every 2 months, and CA AMP every 2 months. Most recently, AX was updated on October 3, 2026 and CA AMP on October 17, 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.*