# Light Meter vs Libre Light Sensor

The clearest difference is price: Libre Light Sensor at Free against Light Meter's $2.99. Libre Light Sensor also leads on rating (4.8 vs 4.2) and review sentiment (82% vs 50%). Light Meter's advantage is device support (3 vs 1) and iOS requirement (13 vs 16.0). On ads and in-app purchases there is nothing between them.

Libre Light Sensor is free to download; Light Meter costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Libre Light Sensor holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Libre Light Sensor has 113 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of Light Meter's written reviews are positive against 82% of Libre Light Sensor's.

Light Meter ships an update every 48 months, Libre Light Sensor every 5 weeks. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Light Meter | Libre Light Sensor |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/light-meter-brightness-calc/id1340670397/reviews) | **[4.8 (113 ratings)](https://appshunter.io/ios/app/libre-light-sensor/id1644439968/reviews)** |
| Number of ratings | 5 | **113** |
| Positive reviews | 50.0% of reviews | **82.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 1 MB |
| Requires iOS | **13** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [John Harrington](https://appshunter.io/developer/1603002572) |

## What reviewers say

### Light Meter

[App page](https://appshunter.io/ios/app/light-meter-brightness-calc/id1340670397)

This application acts as a portable light meter, allowing users to measure light intensity in lux and foot candles. It offers real-time readings, a log library for saving measurements, and the ability to calibrate with professional devices for enhanced accuracy. The app supports both front and rear cameras and saves scene images.

**Highlights:** Real-time light intensity measurement, Lux and foot candle readings, Saveable log library, Calibration with professional illuminometer, Front and rear camera support, Scene image saving

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

**In-app purchases:** none


### Libre Light Sensor

[App page](https://appshunter.io/ios/app/libre-light-sensor/id1644439968)

Measure ambient light levels in Lux using your iPhone's camera. Optimize sleep quality by understanding light exposure throughout the day and night.

**Highlights:** Measure light in Lux, Utilizes iPhone camera, Optimize sleep quality, Track light exposure

**In-app purchases:** none


## Frequently asked questions

### Is Light Meter free?

Light Meter costs $2.99, with no in-app purchases.

### Is Libre Light Sensor free?

Libre Light Sensor is free to download, with no in-app purchases.

### Which has better reviews, Light Meter or Libre Light Sensor?

Libre Light Sensor is rated higher. Light Meter averages 4.2 out of 5 from 5 ratings, while Libre Light Sensor averages 4.8 from 113 ratings.

### Do Light Meter or Libre Light Sensor have ads?

Neither Light Meter nor Libre Light Sensor shows ads.

### Which is updated more often, Light Meter or Libre Light Sensor?

Light Meter ships an update every 48 months, and Libre Light Sensor every 5 weeks. Most recently, Light Meter was updated on September 23, 2026 and Libre Light Sensor on September 22, 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.*