Luxometer vs Libre Light Sensor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Luxometer
Measure ambient light intensity in Lumens and color temperature in Kelvin using your phone's built-in sensors. Point your device at a light source and see real-time readings, enhanced with augmented reality visualizations.
- Ambient light intensity measurement (Lumens)
- Ambient color temperature measurement (Kelvin)
- Real-time data readouts
- Augmented reality visualizations
- Uses device's built-in hardware
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This app functions as a light detector right from the convenience of your phone! As the old saying goes, the best light detector is the one you have on you. Well now, you can have one on you for all your safety and light detection needs with the tap of a finger. App uses the built in hardware and light detection algorithms provided by the device to offer powerful ambient light intensity detection (in Lumens) as well as ambient color temperature(in Kelvin) measurements. Simply point device in direction of light source, toggle the Light Estimation switch, and see the real time read outs of the incoming data. As a nice visual, the app also integrates some of the latest advances in Augment Reality to render floating spheres that reflect the light qualities being detected by the app.
Libre Light Sensor
Measure ambient light levels in Lux using your iPhone's camera. Optimize sleep quality by understanding light exposure throughout the day and night.
- Measure light in Lux
- Utilizes iPhone camera
- Optimize sleep quality
- Track light exposure
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Measure light levels in any environment. Libre Light Sensor leverages your iPhone's camera to calculate luminosity as measured in Lux. This allows you to determine how much light exposure your eyes are receiving when you wake up, during the day, and before bed in order to optimize your sleep quality.
Screenshots
Verdict
The clearest difference is rating: Libre Light Sensor at 4.8 against Luxometer's 4.0. Libre Light Sensor also leads on review sentiment (82% vs 60%) and ratings volume (113 vs 8). Luxometer's advantage is update cadence (daily vs every 5 weeks) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 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 4.0. That said, the two scores are not equally well evidenced: Libre Light Sensor has 113 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 60% of Luxometer's written reviews are positive against 82% of Libre Light Sensor's.
Luxometer ships an update daily, Libre Light Sensor every 5 weeks. The most recent releases landed on September 8, 2026 and September 28, 2026 respectively.
| Parameter | Luxometer | Libre Light Sensor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (8 ratings) | 4.8 (113 ratings) — better |
| Positive reviews | 60.0% of reviews | 82.4% of reviews — better |
| Number of ratings | 8 | 113 — better |
| Update frequency | Daily — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 0 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Arias Software LLC | John Harrington |
Customer experience
Luxometer
Libre Light Sensor
In-app purchases
Luxometer
No in-app purchases
Libre Light Sensor
No in-app purchases
Questions
Is Luxometer free?
Is Libre Light Sensor free?
Which has better reviews, Luxometer or Libre Light Sensor?
Do Luxometer or Libre Light Sensor have ads?
Which is updated more often, Luxometer or Libre Light Sensor?
Other comparisons
