# ProjectorCalc vs Proietta

The clearest difference is price: Proietta at Free against ProjectorCalc's $2.99. ProjectorCalc's advantage is iOS requirement (9.2 vs 11.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Proietta is free to download; ProjectorCalc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ProjectorCalc ships an update every 49 months, Proietta every 58 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ProjectorCalc | Proietta |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/projectorcalc/id310342928/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 49 months** | Every 58 months |
| Monetization | Paid | — |
| Size | 10 MB | 2 MB |
| Requires iOS | **9.2** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [D!HV Lighting](https://appshunter.io/developer/287079053) | [Marco Piai](https://appshunter.io/developer/1513185761) |

## What reviewers say

### ProjectorCalc

[App page](https://appshunter.io/ios/app/projectorcalc/id310342928)

This utility app helps lighting technicians and projectionists calculate projected image dimensions. It determines image width, height, diagonal length, brightness, area, and pixel density based on projector and location details. It also estimates keystone distortion.

**Highlights:** Calculate image width, height, and diagonal length, Determine brightness in Nits, Calculate total projected area, Compute pixels per inch, Estimate keystone distortion

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

**In-app purchases:** none


### Proietta

[App page](https://appshunter.io/ios/app/proietta/id1513185762)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ProjectorCalc free?

ProjectorCalc costs $2.99, with no in-app purchases.

### Is Proietta free?

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

### Do ProjectorCalc or Proietta have ads?

Neither ProjectorCalc nor Proietta shows ads.

### Which is updated more often, ProjectorCalc or Proietta?

ProjectorCalc ships an update every 49 months, and Proietta every 58 months. Most recently, ProjectorCalc was updated on October 7, 2026 and Proietta on October 5, 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.*