SailFreeGPS vs MarineTraffic - Ship Tracking Usage & Stats

Hello, ✓ SailFreeGPS displays current location, course (COG), speed (SOG), max speed, Trip distance, speed average and magnetic compass. ✓ SailFreeGPS displays COG and SOG history (6h) to help you to see trim effect on your sails. ✓ SailFreeGPS filters GPS information for more accuracy (average of an amount of last measures you can set). ✓ SailFreeGPS can share your position, COG, SOG to your friends. ✓ SailFreeGPS helps you during Man OverBoard maneuver (MOB). It stores the location and lead you to it. ✓ SailFreeGPS displays your track on google map (48h). ✓ SailFreeGPS helps you during Regatta with its countdown timer and its departure line ✓ You can store up to 8 waypoints and activate a GOTO function with ETA (Estimated Time to Arrival computation) ✓ You can save/load track to/from GPX/KML file ✓ You can calculate distance and heading ✓ You can use it on every boat, motor or sail boat. ✓ You can now activate an anchor alarm or a course alarm. I am an amateur sailor who has decided to create this app after a Transatlantic cruise. I add periodically functionalities to this app when I have some spare time. Do not forget to calibrate your compass for better results. Please send me an email for any question or problem : contact@sailfreegps.com Encourage me to continue by subscribing to premium version. List of features of Premium Version Premium version DOES NOT CONTAIN ADS. GPS INFO Tab: ✓ Double click on SPEED will reset trip, max and ags speed ✓ Long click on COURSE to display compass ✓ Double click on coordinates to display/hide position Graph Tab: ✓ Double click COG graph to switch to full screen mode MOB Tab: ✓ Displays of relative bearing of the MOB ✓ Displays of tack angles ✓ Double click graph to switch to full screen mode Waypoint Tab: ✓ Up to 200 Waypoints ✓ Displays of relative bearing of Waypoint ✓ Displays of tack angles ✓ Double click graph to switch to full screen mode Map Tab: ✓ Displays of SOG and COG (speed & course) ✓ Your track segments are displayed according to your speed Anchor alarm: ✓ Anchor area can be a polygon and you can adjust its shape Regatta Tab: ✓ "Gun Button" allows to round seconds to nearest minute Ex: 4:03 => 4:00 or 3:58 => 4:00 ✓ Enter exact start time up to the second ✓ Displays of time to kill/save continuing the same way (speed and course) ✓ Displays of ideal speed to cross the line at 0:00 on the same course!!! Settings Tab: ✓ Displays reverse color (white on black back) ✓ You can select Hybrid map ✓ Select on which duration is calculated the speed scale of your track: last 5min, 15 min or all the track ✓ Select your tack angle value. It will be displayed on MOB and WAYPOINT tabs Exit: ✓ Ask to save the track before Exit Note: SailFreeGPS uses a foreground service to get your location