Lux Meter (Light Meter)

39.6K reviews
Content rating
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About this app

Lux Meter is a simple light meter for measuring illuminances (lux, fc) by using the light sensor of your android device.
Key Features:

★ calibrate your device with the multiplier
★ shows the minimum, maximum and average value
★ shows the sensor data
★ 100% free
Updated on
Oct 20, 2019

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, App activity and 2 others
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

39K reviews
Gary Rogers
February 18, 2023
Seems to work well. It's very easy to use. I haven't checked it against a professional meter, but it's relatively close based on my experience. It does have a calibration factor that can be adjusted to match a calibrated light meter. For those who think it is using the wrong side of the phone to measure, you need to look up the difference between incident and reflected light meters. Incident measures the actual light strength. Reflected measures the light after is is reflected off an object.
10 people found this review helpful
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A Google user
February 21, 2020
You get what you pay for! Passes the "look test". It has a clean, well set up screen and scrolling graph. But why do they use the front camera (selfie) for getting their data. The rear (main) camera could get data by aiming at the source without you in the way. It would also be better if you could adjust the graph timeline and have it output to somewhere. But for a free app it is good.
78 people found this review helpful
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A Google user
November 13, 2019
This is one of the least user friendly apps I have ever tried to use. There are no instructions for us, guides, or hints of any type. You open the app and get a screen with nothing but a gauge and a settings button. Does this measure light in real time? Does it snapshot at an interval? It is almost as if the dev's expect you to be psychic or have extensive experience with light meters in order to use this. There is no indication of whether a peripheral device is needed to operate the app.
102 people found this review helpful