Lux Meter from Green Orange Apps is a "single-screen" light meter designed to measure, store illumination values (LX or LUX, FC) and their MIN, MAX, AVG values using your smartphones light sensor.KEY FEATURESWithout destruction and full storage of data:1. Saving contains data on illumination in LUX (LX) + its MAX, MIN and AVG values.2. Changing the LX <-> FC format only affects the on screen data. You can also change the format of the light units in memory mode (from saved data).3. START - STOP BUTTON -> You can measure several light points without transitions. When stopped, the previous light data is retained.CalibrationApplies in the same way as Changing Light Format (LX, FC). Works on saves and is adjustable in the range x9.99 - x0.01