Luminosys - Light Meter

This free and easy meter matches other meters well for natural light. Fancier meters include an artificial light setting; the artificial setting increases the reading by about 13% vs the natural light setting when measuring artificial light.

I've compared this little app with some other, more "professional" light meter apps and honestly it works just as well. The key, as noted in the notification pop up, is to put a blank piece of white copy paper over the camera lens.

W app bruv