SailTimer™

In-app purchases
494 reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
In-App Purchases
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About this app

For all types of boats. Beautiful marine weather animations:
• Crowdsourced wind maps for the most accuracy and highest resolution.
• Marine weather forecasts from Weathernews Inc. (WNI) with maps of precipitation, visibility, air & sea temperature, wind, waves/swell & ocean currents.
• AI models of ocean currents and marine weather from Amphitrite.

There are lots of weather services and apps, but they all use the same GRIB satellite weather forecasts. Low resolution, low accuracy, and only updated 4 times per day. Weather satellites are 500 to 22,000 miles up in space. Crowdsourcing is changing marine weather. In coastal areas, we archive these to map wind flow for more accuracy.

Crowdsourced weather maps like these have never been possible before. A wind sensor measures local wind around your boat, but now you can also know the wind and sea state up ahead or around the next point.

Discount Bundle: Get our Ultrasonic wind sensor with a free Air Link™. Amazing value! https://wi-rb.com/product/discount-bundle/


FEATURES FOR ALL TYPES OF BOATS:
● View your route with free aerial photos and land maps worldwide. Import worldwide Navionics charts with a yearly subscription. All maps and charts can be used offline.

● Hourly weather tables for crowdsourced wind and WeatherNews Inc. (WNI) weather maps. Tap on a certain hour to move the whole weather animation to that time.

● The weather animations have a low-cost monthly subscription with a free 7-day trial.

● Create waypoints by tapping or importing a list.

● Crosshair icon in the top left is the “Follow-Me” button. If tapped, it turns blue and keeps your location in the center of the screen. Unselect to look around the map.

● GPS track can be displayed under options. Save a screenshot to view or share your trip later.


FOR SAILBOATS:
Whether cruising or racing, it is important to be able to determine the best heading on all points of sail. GPS chartplotters and mapping apps do not account for sailboat tacking distances. But if they do not know the distance you will travel, how can they calculate your correct ETA? This is the only product that calculates your optimal tacks using your tacking distance and polar plots. Details at SailTimerApp.com. SailTimer gives you a quick and easy display of your optimal tacks and TTD® (Tacking Time to Destination).

● If you have the wireless SailTimer Wind Instrument™ (SailTimerWind.com) connected to your phone/tablet, your optimal tacks will update automatically in this app as the wind changes. Or you can manually enter wind direction and speed to see your optimal tacks for the route you are planning.

● Just select a route to see the optimal tacks to each waypoint.

● When you pass a waypoint, press the > on the right side of the screen to go to the next waypoint. (Press < on the left side to see optimal tacks to the previous waypoint).

● The optimal tacks are the same headings whether you do the port or starboard tack first. See the FAQs at http://sailtimerapp.com/FAQ.html for hints about avoiding obstructions by switching to the other tack.

● Polar plots: The app comes with a default polar plot for calculating optimal tacks (which you can edit). Plus, it can learn the custom profile for your boat's speed on different wind angles (polar plot).

● Wind gauge button in upper right when using wireless Wind Instrument shows True and Apparent Wind Angle and Direction (TWD, TWA, AWD, AWA) in True-North and Magnetic-North reference.

● Audio feedback is available by tapping screen to hear wind conditions. (More audio features are available in the SailTimer Wind Gauge app).


License Agreement: https://www.sailtimerapp.com/LicenseAgreement_Android.pdf
Navionics privacy policy and terms of use: http://www.sailtimerapp.com/VectorCharts.html.

For any questions, SailTimer Tech Support is prompt and helpful: info@SailTimer.co

See our channel on Tiktok and YouTube for more background. Happy boating!
A marine weather and chartplotter app for all boaters.
Updated on
Sep 16, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location and Personal info
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

487 reviews
Stephen Fewtrell
February 26, 2021
Started off with a decent marine map, which was good. I have a Navionics subscription so in the settings, I selected charts, and Navionics. The chart it brought up is next to useless and is not my Navionics subscription definition map. The App won't let me go back to the default map that it started with, even after uninstall and reinstall. I've uninstalled the App as the map is no good, not showing any Marine navigation marks. Developers, please improve maps options and Navionics interface.
74 people found this review helpful
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SailTimer Inc.
February 27, 2021
Hi, We cannot provide technical support in 350 characters here, but we can reply back to you if you email info@SailTimerinc.com. There is also further information about using Navionics charts in the FAQs at http://sailtimerapp.com/FAQ.html
Bryan Levinge
June 19, 2023
After downloading the App, three attempts to register on a Samsung S23 Ultra. Blank Screen. The app has now been deleted. Seems the developer has a way to go.
19 people found this review helpful
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SailTimer Inc.
June 19, 2023
Hello Bryan Levigne, Thanks for your comment. This is a mature, stable app that is used by a lot of sailors worldwide -- check the number of downloads. This free app has better functions for sailboat navigation than GPS chartplotters costing thousands. We have prompt technical support, and can help you to log in. info@SailTimerinc.com
paul s
October 31, 2020
The £9 is not for Navionics chart themselves but only to unlock app to use a Navionics sign in if you subscribe to Navionics chart areas with Navionics.
64 people found this review helpful
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SailTimer Inc.
November 1, 2020
Thanks for your comment Paul. There is more information in the FAQs about using the excellent Navionics vector charts: SailTimerapp.com/FAQ.html. This is the the only product that accounts for your tacking distances when determining your optimal route. It is great to be able to display your optimal tacking route on Navionics marine charts.

What’s new

• Weather routes: You can now display your waypoints/route with a weather map animation overlaid on Navionics charts.
• Wind maps: tap a location on the animation to see the GRIB satellite forecast (white), and/or crowdsourced wind measurements (purple). It is fun -- look for the green dotted line and target.
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
Sailtimer Inc
info@SailTimer.co
St Margaret’s Bay Halifax, NS B3Z 2G9 Canada
+1 347-670-2496

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