# ControlPRO vs AX

ControlPRO and AX both sit at 2.4 stars, but that hides the real split: 67% of ControlPRO's written reviews are positive against 0% of AX's. ControlPRO also leads on iOS requirement (9.0 vs 12.1). On price, rating, ratings volume and update cadence there is nothing between them.

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

ControlPRO holds the better App Store score, 2.4 against 2.2. Both are backed by a comparable volume of ratings — 10 and 5 respectively. Written reviews point the same way: 67% of ControlPRO's written reviews are positive against 0% of AX's.

ControlPRO ships an update every 3 months, AX every 2 months. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | ControlPRO | AX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.4 (10 ratings)](https://appshunter.io/ios/app/controlpro/id782883006/reviews)** | [2.2 (5 ratings)](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432/reviews) |
| Number of ratings | **10** | 5 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 10 MB | 10 MB |
| Requires iOS | **9.0** | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AAMP Global](https://appshunter.io/developer/1254428712) | [Metra Electronics Corp.](https://appshunter.io/developer/1133973919) |

## What reviewers say

### ControlPRO

[App page](https://appshunter.io/ios/app/controlpro/id782883006)

This application allows users to customize their vehicle's original steering wheel controls to operate aftermarket radio functions. It requires a specific steering wheel control interface from Pacific Accessory Corporation.

**Highlights:** Custom configuration of steering wheel controls, Operate aftermarket radio functions, Compatibility with ControlPRO SWC interfaces, Vehicle-specific control mapping

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ControlPRO free?

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

### Is AX free?

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

### Which has better reviews, ControlPRO or AX?

ControlPRO is rated higher. ControlPRO averages 2.4 out of 5 from 10 ratings, while AX averages 2.2 from 5 ratings.

### Do ControlPRO or AX have ads?

Neither ControlPRO nor AX shows ads.

### Which is updated more often, ControlPRO or AX?

ControlPRO ships an update every 3 months, and AX every 2 months. Most recently, ControlPRO was updated on October 6, 2026 and AX on October 3, 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.*