# A540DSP vs Cardiry

The clearest difference is device support: A540DSP at 3 against Cardiry's 1. A540DSP also leads on iOS requirement (15.6 vs 17.0). On price, 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.

## The numbers

| Metric | A540DSP | Cardiry |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | — |
| Monetization | Free | — |
| Size | 26 MB | 2 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [杏生 卢](https://appshunter.io/developer/1094592555) | [玩星 郑](https://appshunter.io/developer/1891879717) |

## What reviewers say

### A540DSP

[App page](https://appshunter.io/ios/app/a540dsp/id1423992250)

Control your car amplifier's audio settings, including EQ, bass, and time alignment, directly from your phone. Save and load custom sound profiles for a personalized listening experience.

**Highlights:** EQ control, Bass adjustment, Time alignment, Phase and mute settings, Filter control, Save sound settings to phone, Save sound settings to amplifier, Load sound settings from phone

**Features:** macOS Compatibility

**In-app purchases:** none


### Cardiry

[App page](https://appshunter.io/ios/app/cardiry/id6762195125)

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

**In-app purchases:** none


## Frequently asked questions

### Is A540DSP free?

A540DSP is free to download, with no in-app purchases.

### Is Cardiry free?

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

### Do A540DSP or Cardiry have ads?

Neither A540DSP nor Cardiry shows ads.

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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.*