# Luminosys vs Lux Meter

Luminosys and Lux Meter both sit at 4.4 stars, but that hides the real split: 75% of Luminosys's written reviews are positive against 0% of Lux Meter's. Luminosys also leads on monetization model (ad-supported vs free with in-app purchases). Lux Meter's advantage is update cadence (monthly vs every 19 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.4 for Luminosys against 4.3 for Lux Meter. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews are what separate them: 75% of Luminosys's written reviews are positive against 0% of Lux Meter's.

Luminosys ships an update every 19 months, Lux Meter monthly. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Luminosys | Lux Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/lux-meter-light-meter/id6790800796/reviews) |
| Number of ratings | **7** | 4 |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 19 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 3 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Melissa Zwick](https://appshunter.io/developer/1616726350) | [Alper Sumer Guc](https://appshunter.io/developer/1896672915) |

## What reviewers say

### Luminosys

[App page](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389)

Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.

**Highlights:** Measures light in Lux, Measures light in Foot Candles (FC), Uses phone camera for accuracy, Easy to use interface, Suitable for photography, Useful for indoor gardening

**In-app purchases:** none


### Lux Meter

[App page](https://appshunter.io/ios/app/lux-meter-light-meter/id6790800796)

This tool transforms your iPhone into a professional light meter, measuring illuminance in lux and foot-candles in real-time. It offers exposure calculations, color temperature estimates, and various presets for different use cases, all while working offline and without ads.

**Highlights:** Real-time lux and foot-candle readout, Exposure Value (EV) calculation, Color temperature (CCT) estimate, Spot or average metering, Use-case presets, CSV export of readings, 100% offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is Luminosys free?

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

### Is Lux Meter free?

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

### Which has better reviews, Luminosys or Lux Meter?

Luminosys is rated higher. Luminosys averages 4.4 out of 5 from 7 ratings, while Lux Meter averages 4.3 from 4 ratings.

### Do Luminosys or Lux Meter have ads?

Both Luminosys and Lux Meter show ads.

### Which is updated more often, Luminosys or Lux Meter?

Luminosys ships an update every 19 months, and Lux Meter monthly. Most recently, Luminosys was updated on October 7, 2026 and Lux Meter on October 8, 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.*