SailFreeGPS
FredB Sports In-app purchases Contains ads
Sail trim optimizer : analyse your trim effect on your speed or course
- Rating
- 4.7
- 9K ratings
- Downloads
- 1.8M+
- on Google Play
- Price
- Free
- In-app purchases
- Updated
- May 20
- 2026 · v5.1.3
Screenshots
About SailFreeGPS
Hello,
I am an amateur sailor who has decided to create this app during 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 : [email protected]
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
✓ 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
I am an amateur sailor who has decided to create this app during 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 : [email protected]
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
✓ 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
What’s new
Version 5.1.3 · Updated May 20, 2026
Fixed a bug during the subscription process New icon for SailFreeGPS users' position sharing
User reviews
மிகவும் நல்ல பலனை கொடுக்கும் வகையில்உள்ளது. நிறைய பேருக்கு இது உதவும் நன்றி நன்றி நன்றி
Great
Good👍
My best
Jyo
This app is lifesaver especially for a Fisher man like me.. Is this app is free? Do i need to pay monthly or subscribe?
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| App | Rating | Price | Installs | Last updated | Compare |
|---|---|---|---|---|---|
| SailFreeGPS | 4.7 / 5 | Free | 1,000,000+ | May 20, 2026 | |
| Boating Marine & Lakes | 3.7 / 5 | Free | 5,000,000+ | Aug 19, 2026 | Compare |
| Marine Boat GPS Dashboard | 4.0 / 5 | Free | 100,000+ | Oct 5, 2026 | Compare |
| Wavve Boating: Easy Marine GPS | 3.9 / 5 | Free | 500,000+ | Oct 5, 2026 | Compare |
| Lowrance: Fishing & Navigation | 3.2 / 5 | Free | 500,000+ | Jun 15, 2026 | Compare |
| Navily - Your Cruising Guide | 3.5 / 5 | Free | 500,000+ | Sep 21, 2026 | Compare |
| BackCountry Navigator XE: Topo | 4.0 / 5 | Free | 100,000+ | – | Compare |
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