Luxmeter is a free Android app developed by VELUX that measures the intensity of light in different rooms. The app is straightforward to use, and you only need to hold your phone with the display facing upwards to get the luminosity values. With this app, you can quickly determine whether the luminosity in a given space meets the recommended values.

The Luxmeter app displays guiding values of luminosity in lux (lx), and it is easy to use. You can pause and play the measurement anytime you want to take a new measurement. The app does not require any special authorization and contains no advertising. However, to use this app, you need an Android device with a light sensor and Android version 4.0 or higher.