# Lux Light Meter Pro vs Libre Light Sensor

The clearest difference is review sentiment: Libre Light Sensor at 82% against Lux Light Meter Pro's 21%. Libre Light Sensor also leads on rating (4.8 vs 3.9) and in-app purchases (none vs 4). Lux Light Meter Pro's advantage is ratings volume (5.1K vs 113) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Lux Light Meter Pro sells 3 in-app purchases, starting at $1.99 per month. Libre Light Sensor asks for nothing beyond the download.

Libre Light Sensor holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Lux Light Meter Pro has 5.1K ratings behind it against 113, so its average is the more settled of the two. Written reviews point the same way: 21% of Lux Light Meter Pro's written reviews are positive against 82% of Libre Light Sensor's.

Lux Light Meter Pro ships an update every 3 months, Libre Light Sensor every 5 weeks. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Lux Light Meter Pro | Libre Light Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (5.1K ratings)](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866/reviews) | **[4.8 (113 ratings)](https://appshunter.io/ios/app/libre-light-sensor/id1644439968/reviews)** |
| Number of ratings | **5.1K** | 113 |
| Positive reviews | 21.3% of reviews | **82.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 1 MB |
| Requires iOS | **15** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) | [John Harrington](https://appshunter.io/developer/1603002572) |

## What reviewers say

### Lux Light Meter Pro

[App page](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866)

Measure light intensity in lux and foot candles with this 2-in-1 meter. Optimize photography settings, adjust indoor lighting, or prevent eye strain with professional-quality readings directly from your smartphone.

**Highlights:** Real-time lux and foot candle measurements, Real-time color temperature measurements, Real-time histogram plotting, Customizable settings for shutter speed, ISO, aperture, Front and back camera support, Intuitive and customizable controls

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per month |
| Premium Access | $14.99 | per year |
| Pro Mode | $9.99 | one-time |

**What reviewers like**

- 🚀 Simple and straightforward
- 👍 Useful for measuring light levels
- 🔍 Provides general lux measurements

**What reviewers complain about**

- 🐛 Inaccurate and inconsistent readings
- 🔍 Limited functionality compared to professional light meters
- 💰 Requires subscription for full features
- 🤖 Glitchy and non-responsive at times

**Reported bugs**

- Readings stuck at 0 lux regardless of light conditions
- Frequent crashes and freezes
- Inability to switch between front and rear cameras

**Requested features**

- Ability to save and review past measurements
- More detailed instructions and guidance on proper usage
- Improved accuracy and calibration options


### 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 Lux Light Meter Pro free?

Lux Light Meter Pro is free to download, with in-app purchases available.

### Is Libre Light Sensor free?

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

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

Libre Light Sensor is rated higher. Lux Light Meter Pro averages 3.9 out of 5 from 5.1K ratings, while Libre Light Sensor averages 4.8 from 113 ratings.

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

Lux Light Meter Pro shows ads; Libre Light Sensor does not.

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

Lux Light Meter Pro ships an update every 3 months, and Libre Light Sensor every 5 weeks. Most recently, Lux Light Meter Pro was updated on September 24, 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.*