Tidelync reads the marine forecast at every point of your route at the time you'll actually be there, grades it for your boat, works out fuel and ETA, and tells someone ashore if you're overdue. Phone or tablet. No chartplotter, no app store.
Every boat that got into trouble last year left the dock with a weather forecast available. What the skipper didn't have was a tool that applied it to that boat, that route, that hour — or anyone ashore who knew the moment the boat stopped making progress.
The route is sampled every few miles and the forecast is read at the time you'll be at each point — wind, gusts, seas, steepness, fog. The planner scans 48 hours of departures and picks the best window. Multi-day trips get overnight stops and weather holds.
Enter your boat (or pick a model close to it) and one fuel-flow reading you trust. Tidelync builds the speed curve from idle to wide-open throttle, drops you off plane when the seas say so, and tells you whether the round trip fits with a third in reserve.
Live tracking from your phone, one-tap check-ins, and a help message with your last fix, course, speed, next waypoint, ETA and a link to your track. If you're 30 minutes past a waypoint and not there, it fires. A person calls the Coast Guard; the app never does.
One MOB button today: it freezes the spot, shows the bearing and distance back, and alerts your shore contact after 60 seconds unless you hold it. Next, in the app: a $20 waterproof wristband for every adult, kid and dog. Your phone at the helm listens; salt water kills the signal the moment someone goes under, so eight seconds of silence is the alarm, with the name. Headcount before you leave the slip and after every swim stop. No box, no subscription.
Also on the map: wind field, water-temperature contours, NAVAREA and Coast Guard warnings, NOAA limit lines, buoys and lights, live AIS traffic, every marina in OpenStreetMap plus hand-verified contacts with phone and VHF, boat-in campsites and ramps on the lakes, the Great Loop as 88 stops. Import a route from your chartplotter (GPX / KML), export one back.
Cloud-free water temperature, 1 km, daily and contoured, plus NOAA chlorophyll. Find the temp breaks and the green-to-blue edge.
Pick a species. Zones are scored on temp breaks, color edges and that fish's water, and each one tells you why.
Add 2 hours trolling or drifting at a spot. Route, ETA, fuel and GO / NO-GO all include the stop.
Every NOAA buoy on one map: wind, gusts, seas, period, water temp, and the last 48 hours. Open the buoy map.
Buoys near your route feed GO / NO-GO. Rougher than forecast, the grade follows it. Calmer counts half.
Scrub wind, seas and water temperature across the channel, the last two days and the days ahead.
Drop a pin for fish, birds working, bait, whales, kelp or debris. Other boaters see it; it fades unless someone confirms it.
The chart along your route and the forecast are saved at the dock, and cleared when the trip ends.
Your tracks, plus named, starred spots with notes. Filter by date. On every device you use.
Data: NASA JPL MUR sea-surface temperature and NOAA VIIRS chlorophyll via NOAA CoastWatch, NOAA NDBC buoys and NOS stations, National Weather Service marine forecasts, Open-Meteo marine models. Watch the 1-minute fishing walkthrough.
Choose a preset, build one on the chart, or import from Navionics, Garmin or OpenCPN.
Pick a model to start from, correct cruise speed and one known burn. Saved on your device.
GO, CAUTION or NO-GO per point, best departure window, fuel, ETA, water temp, wind.
Add a shore contact. Check in with one tap; Send for help carries everything they need.
The planner is free and stays free. The safety layer ships after it has been proven on real passages — on the founder's 28-foot Regal, trailered from Arizona to the Pacific — before anyone pays for it.
Route grading with live buoys, departure windows, fuel and ETA, satellite fish zones and fishing stops, weather playback, offline at sea, marinas, warnings, AIS, GPX import. Free, no account. Use it, break it, tell us what's wrong.
The TideLync app for Android is in testing on Google Play. Request an invite with the Google account on your phone and we'll send you the link. iPhone is next.
Fuel model calibrated against the engine's own fuel-flow display; grades checked against what the sea actually did; check-in and help messages delivered at the edge of cellular coverage. Beta testers on the Southern California coast invited to run the same passage.
Mexican marina data, no-signal operation over Starlink and satellite messaging, the shared-track link read by a contact back in the US. Accounts and live tracking open to beta testers.
San Diego to Santa Barbara by way of Catalina and the islands: multi-day planning with weather holds, overdue detection on long legs, photos on the track, a family crew using the app. Float plan with automatic escalation goes live for beta testers.
Tracking that survives a locked phone, and the wristband tether: pair your crew once, get a headcount at the dock and an overboard alarm with a name and a bearing. Tested on our boat with a tag on a line and a bucket of seawater before it goes near yours.
Live sharing, float plan with overdue escalation to your shore contact, man overboard and crew tether, pushed warnings. Shared sightings and hazard reports stay free. Beta testers who helped keep it free for a year.
Tell us where you boat and what you run. We'll send the trial-passage dates for your coast, and nothing else.
No spam, no selling your email. Unsubscribe is one reply.
We're not charging for a float plan that hasn't been proven on our own boat. Beta testers who help us run the trials get the safety layer free for a year when it launches.
Tidelync is built to contribute to four of the UN Sustainable Development Goals.
Most boating deaths start with a decision made at the dock. A go/no-go grade read at the hour you'll be out there, a shore contact who has your last position, course and ETA, and a wristband on every child and adult that turns a fall overboard into a marked spot and a bearing within eight seconds, keep people alive.
Safety planning that used to take a chartplotter, a forecast subscription and experience runs free in a browser, on the phone most boaters already carry, built on open public data.
Planning at the speed your hull is efficient burns less fuel on every passage, and fewer boats running dry, grounding or needing a tow means fewer spills at sea. Floating debris you report goes to NOAA's Marine Debris Program in its own categories, and the catch log flags protected species and undersize fish before the hook.
Tidelync runs on public data from NOAA, the National Weather Service and OpenStreetMap, and hands boaters' observations back to the agencies that need them: at-sea debris sightings to NOAA every week, and catch-verified species and size data to fisheries science, with no boater identity in any of it.
Alignment shown here is Tidelync's own assessment. The content of this page has not been approved by the United Nations and does not reflect the views of the United Nations or its officials or Member States. SDG guidelines and materials.