The visually impaired have had access to this cool app for some time. The app also offers a great way to detect and optimize room light for scanning with your smart device.
Light Detector is easy to use. Just run the application and point your iDevice camera in any direction. Light Detector will transform any natural or artificial light source that it encounters into sound. You will hear a higher or lower sound depending upon the intensity of the light.
To use the app with ScanJig - position your tablet or phone on the ScanJig, open the app, turn the ScanJig until the app sounds the highest. The location will offer the best lighting for the scan job.