# LightCalc.io vs Test Signal Generator

The clearest difference is ads: Test Signal Generator at none against LightCalc.io's shown. LightCalc.io's advantage is iOS requirement (18.0 vs 26.5). On price, in-app purchases and device support there is nothing between them.

Both are free to download. LightCalc.io sells 1 in-app purchase, starting at $34.99 per year and Test Signal Generator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | LightCalc.io | Test Signal Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/test-signal-generator/id6781354860/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | — |
| Monetization | — | Free with in-app purchases |
| Size | 57 MB | 3 MB |
| Requires iOS | **18.0** | 26.5 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Streicher-Feldhofer](https://appshunter.io/developer/1896729345) | [Praetorius GmbH](https://appshunter.io/developer/6776974754) |

## What reviewers say

### LightCalc.io

[App page](https://appshunter.io/ios/app/lightcalcio/id6770274311)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LightCalc Plus | $34.99 | per year |


### Test Signal Generator

[App page](https://appshunter.io/ios/app/test-signal-generator/id6781354860)

Generate professional broadcast-style test patterns for displays, projectors, and video workflows. Validate signal chains, troubleshoot streaming, and prepare live productions with various industry-standard patterns and guides.

**Highlights:** Color Bars, Greyscale, Full-screen color fields, Motion Test Patterns, Timecode Overlay, Geometry Guides, Social Media Framing Guides

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Signal Generator Pro | $4.99 | one-time |


## Frequently asked questions

### Is LightCalc.io free?

LightCalc.io is free to download, with in-app purchases available.

### Is Test Signal Generator free?

Test Signal Generator is free to download, with in-app purchases available.

### Do LightCalc.io or Test Signal Generator have ads?

LightCalc.io shows ads; Test Signal Generator does not.

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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.*