# A540DSP vs DC Power Cable Size Calc

The clearest difference is review sentiment: A540DSP at 50% against DC Power Cable Size Calc's 0%. A540DSP also leads on price (Free vs $2.99). DC Power Cable Size Calc's advantage is iOS requirement (12.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

A540DSP is free to download; DC Power Cable Size Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A540DSP ships an update every 47 months, DC Power Cable Size Calc every 43 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | A540DSP | DC Power Cable Size Calc |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[2.7 (3 ratings)](https://appshunter.io/ios/app/dc-power-cable-size-calc/id1439670635/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 43 months** |
| Monetization | **Free** | Paid |
| Size | 26 MB | 9 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [杏生 卢](https://appshunter.io/developer/1094592555) | [Nitrio](https://appshunter.io/developer/321121189) |

## 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


### DC Power Cable Size Calc

[App page](https://appshunter.io/ios/app/dc-power-cable-size-calc/id1439670635)

This utility calculates the appropriate wire gauge for DC power systems based on length, voltage, and current. It helps prevent voltage drops, overheating, and wasted energy by ensuring correct cable sizing for applications like solar panels and battery systems.

**Highlights:** Instant wire gauge calculation, Copyable results, Includes reference formulas, Supports various input units, Guideline for low voltage systems

**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 DC Power Cable Size Calc free?

DC Power Cable Size Calc costs $2.99, with no in-app purchases.

### Do A540DSP or DC Power Cable Size Calc have ads?

Neither A540DSP nor DC Power Cable Size Calc shows ads.

### Which is updated more often, A540DSP or DC Power Cable Size Calc?

A540DSP ships an update every 47 months, and DC Power Cable Size Calc every 43 months. Most recently, A540DSP was updated on October 25, 2026 and DC Power Cable Size Calc on October 24, 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.*