Reperion Professional offers unlimited online history retention. Use the online KML composer to create very specific GPS tracks in KMZ format, based on a date/time range. Every end of the week, our "KML composer" will generate your trip reports, including your audio and pictures, and sends you an email with the results. KMZ files contain all information about your trips : Location, Time, Speed, Course, Altitude and your audio and pictures.....all will be presented in Google Earth. In contrast, Reperion Basic deletes your online records after one month. Of course, you can still save your trips on your harddrive in KMZ format!