# SailTimer™ > Marine weather app with crowdsourced wind and wave forecasts and navigation tools. (iPhone/iPad app by SailTimer Inc..) - Source: https://appshunter.io/ios/app/sailtimer/id326309851 (this page in markdown: same URL + `.md`) - Developer: [SailTimer Inc.](https://appshunter.io/developer/326309854) - Category: Navigation, Sports - Price: Free with in-app purchases - Rating: 1.70/5 from 6 App Store ratings · 27 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 126 MB - Languages: American English - Released: 2009-09-09 - Data updated: 2026-08-19 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/sailtimer/id326309851/reviews.md ## What is SailTimer™? Now for all types of boats. Beautiful weather animations with different types of marine weather: • 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 satellite weather forecast. 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. Why rely on satellite imaging, when you can use actual measurements from other boaters? 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. FEATURES FOR ALL TYPES OF BOATS: • View your route with free aerial photos and land maps worldwide. If you have the Navionics Boating app, you can import worldwide Navionics charts here with a yearly subscription. • The weather map animations each have a low-cost monthly subscription with a free 7-day trial. • Create and rename waypoints by tapping or importing a list. Save, import or email your GPS track. • All maps and charts in the app can be used offline. • The white 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 as you move. Unselect when not moving to look around the map. • Your device will not go to sleep when the app is open, to allow you to continue to monitor your progress on the chart. You can also continue to track your movement with the app running in the background or when the device is asleep (unless you hard-quit). (Note: Continued use of GPS running in the background can dramatically decrease battery life. This app may use your location even when it isn’t open, which can decrease device battery life.) FOR SAILBOATS: Whether cruising or racing, it is important to be able to determine the best heading on all points of sail. GPS chartplotters do not calculate 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 www.SailTimerApp.com. SailTimer gives you a quick and easy display of your optimal tacks and TTD® (Tacking Time to Destination). • Use our wireless Wind Instrument or wired Ultrasonic (www.SailTimer.co) to see wind direction, angle & speed. Enter a waypoint and your optimal tacks will update automatically as the wind changes. • Bring in wind data from any other wind sensor on wifi from NMEA 2000 or 0183, using our low-cost Air Link™ (https://wi-rb.com/airlink). • Custom polar plots: When using a wind sensor, the app can learn your sailboat's unique speed profile on all points of sail, for the most accurate tacking results. • Switch the display to the port or starboard tack to avoid obstructions, or let the app automatically display the tack nearest to your current heading. • Audio Navigation: when using the wireless Wind Instrument, optionally hear wind conditions or boat speed when they change by more than a set amount. • Convert from Apparent to True wind direction, angle & speed. See our channel on Tiktok and YouTube Shorts for more background. ## Key features - Crowdsourced wind and wave map animation - Route viewing with aerial photos and land maps - Waypoint creation and GPS track saving - Offline map and chart usage - Follow-Me GPS tracking - Optimal tacking distance calculation for sailboats ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Navionics Charts | $10.99 | per year | | WNI Marine Weather Map | $2.99 | per month | | Wind Animation | $2.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | USA Atlantic Coast | $15.99 | one-time | | USA Pacific Coast | $15.99 | one-time | | USA Great Lakes | $15.99 | one-time | | USA Gulf Coast | $15.99 | one-time | | ActiveCaptain | Free | one-time | | Polar Plot Learning | Free | one-time | | Cuba, Bahamas, Puerto Rico and US Virgin Islands | $15.99 | one-time | | Import NMEA data | $0.99 | one-time | | SailTimer Pro Bundle | $7.99 | one-time | ## Recent user reviews (10 of 27) All indexed reviews: https://appshunter.io/ios/app/sailtimer/id326309851/reviews.md ### 1/5 — So many bugs *2026-07-18* It’s been years since the UI has so many bugs and there are so many AI design tools that could fix this. **Developer response:** Thanks for your comment. We don't generally receive these comments for many weeks. But if there is something you want to get corrected, or to understand why it is that way, just email our developers at info@SailTimer.co for a prompt reply. For sailors, this is the only app in the world that accounts for tacking distances when calculating your optimal tacks and Tacking Time to Destination. It was also the first app to include polar plot learning, for better projections of your unique boat's speed on all points of sail. We have recently been focusing on adding features to the crowdsourced wind map animation (another first), and weather animations. We appreciate feedback, and will add it to our ongoing list for updates. There have been 3 updates so far in 2025. With version 6 the interface and features are becoming consistent across all platforms. ### 2/5 — Disappointingly buggy *2026-04-22* Persistent error messages upon login **Developer response:** Hello Trassoc, Thanks for your comment. We have prompt and friendly tech support if you run into any problems. Just email info@SailTimer.co We work very hard on the app, and have since the beginning of the app store in 2009. So if there is a problem, just let us know and our developers will have it fixed in the next update! ### 5/5 — Pede Vento *2026-01-09* Muito bom ### 5/5 — Checks all boxes *2025-10-05* Very pleased with this unit that checked all my boxes . 1 Sold in Canada no duties at a good price point. .2 Excellent instructions 3. Help line is knowledgeable about the product. 4. Spare battery and dedicated charger purchased. 5 Air Link purchased to communicate with other blue tooth capable instruments 6 Ease of installation. 7. Compact size and light weight 8. Solar powered with battery charge display 9. Ability to view wind weather and Temperature off other units. 10. Bearings in the vane are top shelf quality. Slightest puff rotates wind cups. ### 1/5 — So many bugs *2025-07-24* It’s been years since the UI has so many bugs and there are so many AI design tools that could fix this. **Developer response:** Thanks for your comment. We don't generally receive these comments for many weeks. But if there is something you want to get corrected, or to understand why it is that way, just email our developers at info@SailTimer.co for a prompt reply. For sailors, this is the only app in the world that accounts for tacking distances when calculating your optimal tacks and Tacking Time to Destination. It was also the first app to include polar plot learning, for better projections of your unique boat's speed on all points of sail. We have recently been focusing on adding features to the crowdsourced wind map animation (another first), and weather animations. We appreciate feedback, and will add it to our ongoing list for updates. There have been 3 updates so far in 2025. With version 6 the interface and features are becoming consistent across all platforms. ### 2/5 — Disappointingly buggy *2025-06-04* Persistent error messages upon login **Developer response:** Hello Trassoc, Thanks for your comment. We have prompt and friendly tech support if you run into any problems. Just email info@SailTimer.co We work very hard on the app, and have since the beginning of the app store in 2009. So if there is a problem, just let us know and our developers will have it fixed in the next update! ### 1/5 — SailTimer rêviez *2025-05-31* App désastreuse aux fonctionnalités très limitées et sans intérêt **Developer response:** Ha ha ha ! Vos commentaires sont totalement faux. Il s'agit d'un traceur de cartes complet avec animations météo pour tous les plaisanciers. De plus, pour les navigateurs, il offre des fonctionnalités uniques, introuvables ailleurs. Comment une application peut-elle être « limitée et inintéressante » alors qu'elle peut apprendre les polaires de votre navire et les utiliser pour calculer votre temps de virement de bord ? Comment une application peut-elle être « limitée et inintéressante » alors qu'elle peut afficher des cartes de vent collaboratives pour connaître la position du vent autour du point suivant ? ### 5/5 — Checks all boxes *2025-03-30, version 5.9.5* Very pleased with this unit that checked all my boxes . 1 Sold in Canada no duties at a good price point. .2 Excellent instructions 3. Help line is knowledgeable about the product. 4. Spare battery and dedicated charger purchased. 5 Air Link purchased to communicate with other blue tooth capable instruments 6 Ease of installation. 7. Compact size and light weight 8. Solar powered with battery charge display 9. Ability to view wind weather and Temperature off other units. 10. Bearings in the vane are top shelf quality. Slightest puff rotates wind cups. ### 1/5 — Poor *2024-08-19, version 5.9.5* I would like to have said love it But I’m more likely to say - ripped it out and threw it away !! ### 1/5 — DO NOT WASTE YOUR MONEY *2024-08-02, version 5.9.5* I ordered the wind instrument - it took 10 months to arrive. Then spent hours trying to get it to reliably send wind data - no luck - always patchy. The app is clunky and hard to use. I downloaded navitronics chart package then it loops every time try open or close. The wind gauge (the main reason to use the wind instrument) is clunky (and almost never works reliably). Some much better options out there… ## Frequently asked questions about SailTimer™ ### Does SailTimer™ have ads? SailTimer™ is ad-free, allowing for an uninterrupted experience while navigating. You can enjoy all features without any advertisements interrupting your view. ### What is the subscription cost for SailTimer™ features? The WNI marine weather map and wind animation features are available for $2.99 per month with a 7-day free trial. Navionics charts are offered as a yearly subscription for $10.99. ### Can I use SailTimer™ offline? Yes, all maps and charts within SailTimer™ can be used offline. This ensures you have access to navigation data even when you are out of cellular service range. ### What devices is SailTimer™ compatible with? SailTimer™ is designed for iOS devices, including iPhone, iPad, and iPod. The animation feature may require iOS 16 or later. ### How often is SailTimer™ updated? SailTimer™ was last updated on December 23, 2025, with version 6.2. The developer, SailTimer Inc., regularly adds new features and improvements. ### What is the age rating for SailTimer™? SailTimer™ has an age rating of 4+, making it suitable for a wide range of users. The app's content is generally appropriate for children and adults. ### What do users think of SailTimer™? Based on the available data, SailTimer™ has a rating of 2.0 stars from 2 ratings. This suggests that while some users find value in its features, there may be areas for improvement. ### How does SailTimer™ calculate optimal tacks for sailboats? SailTimer™ calculates optimal tacks by using your tacking distance and polar plots. This feature helps sailboats determine the best heading for cruising or racing, which GPS chartplotters may not calculate accurately. ## Version history (last 5 releases) ### 6.3.4 — 2026-08-11 The crowdsourced wind maps get more features: • 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. • A new table with icons for hourly wind at your location. Tap on any of them to move the wind map ahead to that time. ### 6.3.1 — 2026-08-08 Ongoing refinement of the beautiful weather animations with different types of marine weather: • 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. ### 6.3 — 2026-07-17 Beautiful weather animations with different types of marine weather: • 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. Improved layout of buttons for different screen sizes. ### 6.2 — 2025-12-23 Beautiful weather animations with different types of marine weather: • 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 forecasts and marine weather from Amphitrite. Their AI models of ocean currents are trained on in-situ measurements and satellite imaging of sea temperature, altimetry & chlorophyl (plant plankton). ### 6.0.4 — 2025-08-01 • Crowdsourced wind map animation - only from SailTimer. • WNI marine weather used by thousands of ship captains every day. • Rotation is locked in the orientation the app opens in. • Correction to wind speedometer on smaller iPhone displays. ## Apps similar to SailTimer™ | App | Rating | Price | Category | | --- | --- | --- | --- | | [tcSpeeds](https://appshunter.io/ios/app/tcspeeds/id1441225371) | 4.9 (10) | Free | Navigation | | [qtVlm](https://appshunter.io/ios/app/qtvlm/id999110023) | 3.3 (7) | Free | Navigation | | [NavLink HD](https://appshunter.io/ios/app/navlink-hd/id1183848518) | 4.2 (11) | Free | Navigation | | [Sail Buddy](https://appshunter.io/ios/app/sail-buddy/id1100095207) | 4.4 (14) | $4.99 | Navigation | | [VMGPolar](https://appshunter.io/ios/app/vmgpolar/id6451073241) | 4.7 (3) | Free | Navigation | | [Sailing Master M](https://appshunter.io/ios/app/sailing-master-m/id1566599912) | 5.0 (1) | Free | Navigation | ## More apps by SailTimer Inc. - [SailTimer API™](https://appshunter.io/ios/app/sailtimer-api/id959558893) - [SailTimer API™](https://appshunter.io/ios/app/sailtimer-api/id1562869275) - [Air Link™](https://appshunter.io/ios/app/air-link/id6469375299) All apps by SailTimer Inc.: https://appshunter.io/developer/326309854 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*