# A540DSP vs GTD 11012A

The clearest difference is update cadence: GTD 11012A at every 14 months against A540DSP's every 47 months. GTD 11012A also leads on iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and device support 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, GTD 11012A every 14 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | A540DSP | GTD 11012A |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 14 months** |
| Monetization | Free | — |
| Size | 26 MB | 24 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [杏生 卢](https://appshunter.io/developer/1094592555) | [Blapac Sdn Bhd](https://appshunter.io/developer/1267753574) |

## 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


### GTD 11012A

[App page](https://appshunter.io/ios/app/gtd-11012a/id6495970983)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A540DSP free?

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

### Is GTD 11012A free?

GTD 11012A is free to download, with no in-app purchases.

### Do A540DSP or GTD 11012A have ads?

Neither A540DSP nor GTD 11012A shows ads.

### Which is updated more often, A540DSP or GTD 11012A?

A540DSP ships an update every 47 months, and GTD 11012A every 14 months. Most recently, A540DSP was updated on October 25, 2026 and GTD 11012A on October 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.*