GPS Track Viewer allows you to view KML, KMZ, GPX, CSV and NMEA files on a Google Map.It supports Standard, Terrain, Satellite and Hybrid mode.The app registers for the supported file types and can be selected in all popular file managers as viewer.The following extensions / formats are supported:- KML & KMZ- GPX- CSV (Latitude and Longitude columns needed)- NMEA and TXTThe app allows to open up to 10 tracks for free, afterwards it will ask you to buy the app.