Light Meter - Lux, Exposure
An app that measures light and works out camera exposure settings.
What Light Meter - Lux, Exposure does
Light Meter - Lux, Exposure is a light meter for Android from Contechity, a small studio. It reads brightness in lux, foot-candles or EV and includes an exposure calculator for photos and video. It's highly rated on Google Play and free to use, with a one-time purchase for advanced tools.
This app covers two jobs. For everyday use, it tells you how bright a room, desk or growing spot is in lux or foot-candles. For photographers and filmmakers, it turns that reading into exposure settings, balancing aperture, shutter speed, ISO and filters.
You can choose incident metering, which measures the light falling on a spot, or reflective metering, which measures light bouncing off your subject. There's also a shutter angle tool for video, a place to save readings, and support for 40 languages.
It's free to use, and a review of light meter apps notes that some advanced tools need a one-time purchase rather than a subscription. We couldn't confirm that price. It has a 4.7 rating on Google Play. Like any phone light meter, treat readings as a guide, not a calibrated instrument.
Alternatives to Light Meter - Lux, Exposure
Who it's for
Skip it if: iPhone owners (we only confirmed an Android version).
Pricing
Free planFree to use. Some advanced tools need a one-time purchase, according to a roundup of light meter apps. We couldn't confirm the price from the Google Play listing.
Prices can vary by country. Checked 19 Oct 2026.
What people like
- Highly rated on Google Play
- Works for both brightness and camera exposure
- One-time purchase instead of a subscription, per one review
- Available in 40 languages
Watch out for
- Upgrade price isn't shown on the listing
- No iPhone version confirmed
- Photo terms can feel technical at first
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Questions people ask
Is this light meter app free?
Yes, the core meter is free. Some advanced tools need a one-time purchase.
Can it measure lux for plants?
Yes. It shows brightness in lux and foot-candles, which you can compare around your home.
What's the difference between incident and reflective metering?
Incident measures the light falling on a spot. Reflective measures the light bouncing off your subject toward the camera.