Spectrum Sensing App

Has anyone tried the Spectrum Sensing app that is listed as a part of OsmocomSDR? http://sdr.osmocom.org/trac/wiki/GrOsmoSDR It seems that documentation for it is in the works. I need to generate a spectrum survey log file comprising time, frequency and signal strength. My RF front end is a HackRF. Any pointers would be greatly appreciated. Thanks!