# DTrol vs Pixel Density Calculator

The clearest difference is price: DTrol at Free against Pixel Density Calculator's $2.99. DTrol also leads on update cadence (every 2 months vs every 38 months). Pixel Density Calculator's advantage is iOS requirement (13 vs 18.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

DTrol is free to download; Pixel Density Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for DTrol against 5.0 for Pixel Density Calculator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

DTrol ships an update every 2 months, Pixel Density Calculator every 38 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | DTrol | Pixel Density Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/dtrol-av-zone-remote/id1296670853/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/pixel-density-calculator/id6444243922/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 38 months |
| Monetization | **Free** | Paid |
| Size | 1 MB | 3 MB |
| Requires iOS | 18.0 | **13** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fast Five Products LLC](https://appshunter.io/developer/1817070495) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### DTrol

[App page](https://appshunter.io/ios/app/dtrol-av-zone-remote/id1296670853)

Control NAD processors and receivers remotely via WiFi. Manage power, volume, mute, source selection, and tuner presets across multiple zones. Customize settings and launch source apps for a seamless audio-visual experience.

**Highlights:** Power control, Volume adjustment, Mute function, Source selection, Tuner presets, Multi-zone support, User customization

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

**In-app purchases:** none


### Pixel Density Calculator

[App page](https://appshunter.io/ios/app/pixel-density-calculator/id6444243922)

Calculate the pixels per inch (PPI) or dots per inch (DPI) for any display. This tool helps determine screen resolution based on dimensions and pixel count, also calculating screen size, aspect ratio, and megapixels.

**Highlights:** Calculate Pixels Per Inch (PPI), Calculate Dots Per Inch (DPI), Determine screen size, Calculate aspect ratio, Megapixel count calculation, Shape preview

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

**In-app purchases:** none


## Frequently asked questions

### Is DTrol free?

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

### Is Pixel Density Calculator free?

Pixel Density Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, DTrol or Pixel Density Calculator?

DTrol and Pixel Density Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do DTrol or Pixel Density Calculator have ads?

Neither DTrol nor Pixel Density Calculator shows ads.

### Which is updated more often, DTrol or Pixel Density Calculator?

DTrol ships an update every 2 months, and Pixel Density Calculator every 38 months. Most recently, DTrol was updated on November 3, 2026 and Pixel Density Calculator on November 3, 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.*