# Retinal vs Pixel Density Calculator

The clearest difference is price: Retinal at Free against Pixel Density Calculator's $2.99. Retinal also leads on update cadence (fortnightly vs every 38 months). Pixel Density Calculator's advantage is device support (3 vs 1) and iOS requirement (13 vs 17.0). On ads and in-app purchases there is nothing between them.

Retinal 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.

Retinal ships an update fortnightly, Pixel Density Calculator every 38 months. The most recent releases landed on October 11, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Retinal | Pixel Density Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pixel-density-calculator/id6444243922/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 38 months |
| Monetization | — | Paid |
| Size | 1 MB | 3 MB |
| Requires iOS | 17.0 | **13** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nico Rohrbach](https://appshunter.io/developer/662717596) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### Retinal

[App page](https://appshunter.io/ios/app/retinal/id1564557619)

**Features:** macOS Compatibility

**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 Retinal free?

Retinal 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.

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

Neither Retinal nor Pixel Density Calculator shows ads.

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

Retinal ships an update fortnightly, and Pixel Density Calculator every 38 months. Most recently, Retinal was updated on October 11, 2026 and Pixel Density Calculator on September 26, 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.*