# TideRoute Sailing: Auto GRIB — Polar/routing/repeater/alarms

> Polar/routing/repeater/alarms (iPhone/iPad app by GanSoft SARL.)

- Source: https://appshunter.io/ios/app/tideroute-sailing-auto-grib/id6787247113 (this page in markdown: same URL + `.md`)
- Developer: [GanSoft SARL](https://appshunter.io/developer/1895944235)
- Category: Navigation, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 52 MB
- Languages: American English, Croatian, Dutch, French (France), German (Germany), Greek, Italian, Norwegian Bokmål, European Portuguese, European Spanish
- Released: 2026-07-11
- Data updated: 2026-10-13

## What is TideRoute Sailing?

TideRoute 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 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 and the closest to the finish.

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)
• 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. The capture workshop (experimental) fills an angle / wind-speed grid cell by cell as you sail: it waits for a settled regime, discards the minutes after a manoeuvre, flags doubtful cells. Interpolate the gaps, correct by hand, merge outings, export to .pol or .csv. That is your boat, not the sister-ship's.

The display then puts your speed against the target: 96 % upwind, you are still looking; 103 %, you are holding the right trim.

ON BOARD
• Instrument display (NMEA 0183, Signal K)
• Alarms: anchor drag, shallow water, strong wind, cross-track error, battery
• AIS, tracks, passage table, GPX export
• OpenStreetMap and OpenSeaMap charts: marks, soundings, seagrass
• Offline: cached charts, GRIB kept on board, tide computed without network
• Comparator: overlay several routings and replay them

GFS wind routing is free, without limit.
Auto-renewing subscription: it renews unless cancelled at least 24 hours before the end of the period, and can be managed in your App Store account settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly | $44.99 | per year |
| Monthly | $6.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $200.00 | one-time |


## Is TideRoute Sailing safe?

Not enough ratings yet to assess TideRoute Sailing.

## Is TideRoute Sailing legit?

TideRoute Sailing: Auto GRIB appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for TideRoute Sailing is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.2.55 — 2026-10-09

iPad and large screens: route schedule sized to its table, bigger map buttons, Route in the bottom bar, a smaller display tile size. Route schedule: danger sign where wind is against current (rough sea); tacks are placed at their exact point. Currents: the fine source and Copernicus now complement each other on the chart. Weather: a sheet for each model (area, duration, data); ICON-EU and ICON-D2 can be downloaded. Layout fixes on small screens.

### 1.2.54 — 2026-10-09

Routing: narrow passes in the Adriatic, the Ionian Islands and the Peloponnese are now taken into account (25 m coastline). A point placed on land is refused with a message instead of being silently moved.

### 1.2.53 — 2026-10-08

Routing: the last leg to the destination is now properly sailed — no more straight line into the wind on short routes. My routes: the pencil opens Save and Compute, and an edited route keeps its name. Route schedule: wind (TWS, TWA) is now shown on manoeuvre rows too.

### 1.2.51 — 2026-10-07

Nautical charts: sign in with your GeoGarage account to display your charts, online and offline. Route schedule: each tack, gybe and course change shows its position, followed by a line with the new course.

### 1.2.48 — 2026-10-02

Clearer map: instrument display you adjust with a tap, buttons grouped at the top, route preparation in the Routing tab. Free local currents now show with the current layer; anchor watch and alarms are visible on the map.

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All apps by GanSoft SARL: https://appshunter.io/developer/1895944235

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*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 2026-10-13.*