Hello,

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 free time.

✓ SailFreeGPS displays current position, course (COG), speed (SOG), max speed, Trip distance, speed average and magnetic compas.
✓ 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 measure you can set).
✓ SailFreeGPS can share your position, COG, SOG to your friends.
✓ SailFreeGPS helps you during Man OverBoard manoeuvre (MOB). It store the position and lead you to it.
✓ SailFreeGPS display your track on google map (24h).
✓ SailFreeGPS helps you during Regatta with its countdown timer and its departure line
✓ You can store up to 5 waypoints and activate a GOTO function with ETA (Estimated Time to Arrival computation)
✓ You can convert your track to GPX/KML file
✓ You can use it on every boat, motor or sail boat.
✓ You can now activate an anchor alarm or a course alarm.

Compass is a very tricky sensor, some time not accurate or some time just not calibrated. In this case, just consider https://support.google.com/maps/answer/2839911?co=GENIE.Platform%3DAndroid

Please send me an email for any question or problem : sailfreegps@gmail.com

Not available on iOS

Encourage me to continue by subscribing to premium version.

List of features of Premium Version

Premium version DOES NOT CONTAIN ADS.

GPS INFO Tab:
✓ Doucle 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 100 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 départure 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