# A540DSP vs iPro

The clearest difference is iOS requirement: iPro at 11.0 against A540DSP's 15.6. 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.

A540DSP ships an update every 47 months, iPro every 30 months. The most recent releases landed on October 3, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | A540DSP | iPro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 30 months** |
| Monetization | Free | — |
| Size | 26 MB | 8 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [杏生 卢](https://appshunter.io/developer/1094592555) | [Guangzhou Coolpower Technology Co., Ltd.](https://appshunter.io/developer/1152993269) |

## 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


### iPro

[App page](https://appshunter.io/ios/app/ipro-100/id6444885433)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A540DSP free?

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

### Is iPro free?

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

### Do A540DSP or iPro have ads?

Neither A540DSP nor iPro shows ads.

### Which is updated more often, A540DSP or iPro?

A540DSP ships an update every 47 months, and iPro every 30 months. Most recently, A540DSP was updated on October 3, 2026 and iPro on September 25, 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.*