Quick Tide Sailing
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Everyone
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10+
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About this app
Quick Tide Sailing plans and runs your passages, under sail or under power: routing, multi-model GRIB, current and tide, ORC polars, marine charts. Free to start.
THE ROUTING, AND WHY IT IS FASTER
Draw your route, pick a departure time, run the calculation. The isochrone algorithm looks for the fastest track from your polar, the wind, the swell, the current, the day/night cycle and your motoring rules, while clearing the coast.
The calculation advances by successive fronts, discarding at each step the positions with no future. A classic router keeps, per sector, only the one furthest from the start. Upwind, that criterion turns against you: the tack that gains towards the mark is not the one that goes furthest away. It gets discarded, and the route commits to a long losing board. Here each front keeps both — the most advanced positions and the closest to the finish. The winning tack is never thrown away.
Measured on Groix-Ouessant, same GRIB and same polar, 100 % sailing: 16 h 57 for 100 miles, against 20 h 40 for 152 miles on a well-established consumer router. Three hours forty less, 18 %. The gap comes from the algorithm, not from the engine.
AND FOR MOTORBOATS
Raise the "Motor below" setting above any speed under sail and enter your motoring speed: the routing becomes a power calculation, current, tide, swell and coastline included. Against a 5-knot tidal race, an 8-knot motor cruiser stakes its day on the time of passage.
THE CURRENT IS PART OF THE CALCULATION
Current is not a decorative overlay: it enters the routing. Useful wind is taken in the water frame, and speed over ground follows.
• From the Baltic to the Mediterranean, 412 current areas of at least 1 knot, surveyed over a full spring cycle
• Fine mesh where current makes the day: our own 100 m model on the English coast, Ifremer 250 m in Brittany and the Channel, BSH on the Elbe and the Belts, Copernicus Marine elsewhere
• Tide computed on board: heights, high and low waters, at any date, with no network
• Best departure time: a sweep compares the departures in your window and keeps the one that passes the races at the right moment
WEATHER AND MODELS
• ECMWF and GFS offshore, up to 10 and 16 days
• AROME 1.3 km and ARPEGE 0.1° (Meteo-France), ICON-EU 7 km and ICON-D2 2.2 km (DWD)
• Swell and period, gusts, pressure, temperature, cloud, rain, CAPE
• The finest model for the area is offered; the GRIB follows the extent of your route
THE SOLENT, MODELLED FOR ITSELF
General-purpose current sources work on a 1.5 km grid — three cells across a channel three miles wide. We built our own: a hydrodynamic model of the Solent, the Isle of Wight, Hurst and the Needles on a 100 m mesh. Developed with AI assistance, from open data, checked against published tide gauge records. Harmonic tide: currents for any date, months ahead.
YOUR POLAR, MEASURED UNDER WAY
Start from the monohull and multihull library, from the ORC database — thousands of certified boats — or from your own CSV and .pol files.
Then build your own at sea, on its own. The workshop fills an angle / wind-strength grid while you sail: it waits for a settled state, discards the minutes after a manoeuvre and wind outside the range, smooths the swell. At a 1-knot step and up to 40, the grid gets fine. Cells you never sailed stay empty rather than invented.
And that is when it becomes a tuning tool. Your speed is compared with YOUR boat's polar — not the builder's, not a sister-ship's. 96 % upwind, you are still searching; 103 %, you have the right trim. A day at 90 % everywhere with no weather reason, and you know where to look: tired sail, propeller, fouled hull.
FREE AND PREMIUM
GFS wind routing is free, without limit. The subscription adds current, tide, swell and the high-resolution models. Free trial on first launch.
Ten languages. Cruising and racing.
THE ROUTING, AND WHY IT IS FASTER
Draw your route, pick a departure time, run the calculation. The isochrone algorithm looks for the fastest track from your polar, the wind, the swell, the current, the day/night cycle and your motoring rules, while clearing the coast.
The calculation advances by successive fronts, discarding at each step the positions with no future. A classic router keeps, per sector, only the one furthest from the start. Upwind, that criterion turns against you: the tack that gains towards the mark is not the one that goes furthest away. It gets discarded, and the route commits to a long losing board. Here each front keeps both — the most advanced positions and the closest to the finish. The winning tack is never thrown away.
Measured on Groix-Ouessant, same GRIB and same polar, 100 % sailing: 16 h 57 for 100 miles, against 20 h 40 for 152 miles on a well-established consumer router. Three hours forty less, 18 %. The gap comes from the algorithm, not from the engine.
AND FOR MOTORBOATS
Raise the "Motor below" setting above any speed under sail and enter your motoring speed: the routing becomes a power calculation, current, tide, swell and coastline included. Against a 5-knot tidal race, an 8-knot motor cruiser stakes its day on the time of passage.
THE CURRENT IS PART OF THE CALCULATION
Current is not a decorative overlay: it enters the routing. Useful wind is taken in the water frame, and speed over ground follows.
• From the Baltic to the Mediterranean, 412 current areas of at least 1 knot, surveyed over a full spring cycle
• Fine mesh where current makes the day: our own 100 m model on the English coast, Ifremer 250 m in Brittany and the Channel, BSH on the Elbe and the Belts, Copernicus Marine elsewhere
• Tide computed on board: heights, high and low waters, at any date, with no network
• Best departure time: a sweep compares the departures in your window and keeps the one that passes the races at the right moment
WEATHER AND MODELS
• ECMWF and GFS offshore, up to 10 and 16 days
• AROME 1.3 km and ARPEGE 0.1° (Meteo-France), ICON-EU 7 km and ICON-D2 2.2 km (DWD)
• Swell and period, gusts, pressure, temperature, cloud, rain, CAPE
• The finest model for the area is offered; the GRIB follows the extent of your route
THE SOLENT, MODELLED FOR ITSELF
General-purpose current sources work on a 1.5 km grid — three cells across a channel three miles wide. We built our own: a hydrodynamic model of the Solent, the Isle of Wight, Hurst and the Needles on a 100 m mesh. Developed with AI assistance, from open data, checked against published tide gauge records. Harmonic tide: currents for any date, months ahead.
YOUR POLAR, MEASURED UNDER WAY
Start from the monohull and multihull library, from the ORC database — thousands of certified boats — or from your own CSV and .pol files.
Then build your own at sea, on its own. The workshop fills an angle / wind-strength grid while you sail: it waits for a settled state, discards the minutes after a manoeuvre and wind outside the range, smooths the swell. At a 1-knot step and up to 40, the grid gets fine. Cells you never sailed stay empty rather than invented.
And that is when it becomes a tuning tool. Your speed is compared with YOUR boat's polar — not the builder's, not a sister-ship's. 96 % upwind, you are still searching; 103 %, you have the right trim. A day at 90 % everywhere with no weather reason, and you know where to look: tired sail, propeller, fouled hull.
FREE AND PREMIUM
GFS wind routing is free, without limit. The subscription adds current, tide, swell and the high-resolution models. Free trial on first launch.
Ten languages. Cruising and racing.
Sail and power routing: current and tide in the calculation, automatic GRIB
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What’s new
Currents are now free where they matter most. Lorient roadstead, Gulf of Morbihan and Quiberon bay: fine-scale currents are offered there, computed on board by the app — no subscription, no network, right into channels with no coverage.
They now show wherever there is water, shoals included, and cover two full days. The map reopens where you left it.
They now show wherever there is water, shoals included, and cover two full days. The map reopens where you left it.
App support
phone
Phone number
+41225505789
About the developer
GANSOFT Sàrl
support@gansoft.ch
Quai du Seujet 30
1201 Genève
Switzerland
+41 77 446 21 44
