# Unit Conversion Lab vs FlickerCheck

The clearest difference is in-app purchases: Unit Conversion Lab at none against FlickerCheck's 1. FlickerCheck's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. FlickerCheck sells 1 one-off in-app purchase. Unit Conversion Lab asks for nothing beyond the download.

## The numbers

| Metric | Unit Conversion Lab | FlickerCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/flickercheck-pwm-meter/id6804622251/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 10 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Selcuk ASLANTAS](https://appshunter.io/developer/1556053491) | [biaopeng zhou](https://appshunter.io/developer/1895904365) |

## What reviewers say

### Unit Conversion Lab

[App page](https://appshunter.io/ios/app/unit-conversion-lab/id6756374797)

**Features:** macOS Compatibility

**In-app purchases:** none


### FlickerCheck

[App page](https://appshunter.io/ios/app/flickercheck-pwm-meter/id6804622251)

This utility uses your iPhone camera to detect and analyze screen and light flicker. It provides easy-to-understand results, including estimated frequency and modulation depth, with privacy-focused on-device processing.

**Highlights:** Screen and Light measurement modes, Automatic signal quality guidance, Estimated dominant flicker frequency, Modulation depth estimate, Flicker level indication, Measurement confidence score, Brightness waveform capture, Measurement history

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $4.99 | one-time |


## Frequently asked questions

### Is Unit Conversion Lab free?

Unit Conversion Lab is free to download, with no in-app purchases.

### Is FlickerCheck free?

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

### Do Unit Conversion Lab or FlickerCheck have ads?

Unit Conversion Lab shows ads; FlickerCheck 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.*