# AX vs AppUP+

The clearest difference is rating: AppUP+ at 3.7 against AX's 2.2. On price, review sentiment, 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.

AppUP+ holds the better App Store score, 3.7 against 2.2. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

AX ships an update every 2 months, AppUP+ every 5 weeks. The most recent releases landed on September 7, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | AX | AppUP+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (5 ratings)](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/appup-plus/id1509898562/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 10 MB | 34 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) | [Gigaboyz.com LIMITED](https://appshunter.io/developer/1141349514) |

## 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


### AppUP+

[App page](https://appshunter.io/ios/app/appup-plus/id1509898562)

This utility app helps you update the firmware and software for your car radio system. It connects to a cloud server to check for the latest updates and prompts you to install them, ensuring your car's audio system is always current.

**Highlights:** Car radio firmware updates, Software upgrades, Cloud server integration, Automatic update prompts, Latest system versions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AX free?

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

### Is AppUP+ free?

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

### Which has better reviews, AX or AppUP+?

AppUP+ is rated higher. AX averages 2.2 out of 5 from 5 ratings, while AppUP+ averages 3.7 from 3 ratings.

### Do AX or AppUP+ have ads?

Neither AX nor AppUP+ shows ads.

### Which is updated more often, AX or AppUP+?

AX ships an update every 2 months, and AppUP+ every 5 weeks. Most recently, AX was updated on September 7, 2026 and AppUP+ on July 5, 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.*