Megapixel Calculator vs Retinal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Megapixel Calculator
This utility helps you understand screen and image resolutions. Calculate megapixels from dimensions or find dimensions from megapixels. It also includes a DPI calculator for screens.
- Calculate megapixels from dimensions
- Calculate dimensions from megapixels
- Determine aspect ratio
- DPI calculator
- Supports various resolutions
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Megapixel Calculator is very useful and informative app for understanding different resolutions. Just type number of megapixels and you will see all possible variations of screen, photo and camera resolutions. Or even more - type the resolution of your photo, screen or camera, and the app will tell you the aspect ratio and number of megapixels. Now app includes DPI calculator. Just input screen resolution and size in inches, and the DPI of the screen will be shown. Megapixel Calculator now includes: - Resolutions Calculator - Megapixel Calculator - DPI Calculator
Retinal
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Not all displays for Mac are well suited to display the user interface in a non-scaled resolution. A pixel density of about 110 pixels per inch (PPI) for non-Retina, and about 220 PPI for Retina is comfortable for most people. Use Retinal to work out the pixel density of any display.
Screenshots
Verdict
The clearest difference is ads: Retinal at none against Megapixel Calculator's shown. Retinal also leads on update cadence (fortnightly vs every 10 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Megapixel Calculator ships an update every 10 months, Retinal fortnightly. The most recent releases landed on October 22, 2026 and October 11, 2026 respectively.
| Parameter | Megapixel Calculator | Retinal |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Tihomir Radev | Nico Rohrbach |
In-app purchases
Megapixel Calculator
No in-app purchases
Retinal
No in-app purchases
Questions
Is Megapixel Calculator free?
Is Retinal free?
Do Megapixel Calculator or Retinal have ads?
Which is updated more often, Megapixel Calculator or Retinal?
Other comparisons
