The Illuminati Meter app is for use with Illuminati Instruments light & color meters. This app REQUIRES that you have an IM100 or IM150 Bluetooth light & color meter. The app gets readings from the meter and displays the correct exposure, color temperature, and other light-related data on your smartphone. Use the readings from the app to enter exposure and white balance information into your mirrorless, DSLR. or digital cinema camera. The app also reports illuminance (in lux) and CIE xy chr