mylux

The sensor that is used is positioned above the display of your phone, for a correct measurement of illuminance, place it perpendicular to the light rays. You will quickly notice the amount of (lux) which were perceived by your sensor. It is not, a professional tool but it can definitely give you an idea of how many lux you have in your environment. The software has been calibrated with the professional devices and for this reason for the amateur use to which it will make, does not need further adjustment. Start using it.