SQMroid

This app allows reading and logging sky quality data from the Unihedron(TM) SQM-LU using an Android phone. You need a USB OTG cable to allow plugging the SQM-LU into your phone.

The app not only reads the sky quality and device temperature, but also optionally the GPS coordinates if location permission is granted. If file permissions are granted, it will log the data to a CSV file. The app also uses the sensors on your phone to compute the altitude and azimuth; if you hold the SQM back-to-back with your phone, this should tell you where the SQM is pointing.