Sailing apps compared: navigation, weather, racing replay and performance analytics

Sailors often compare apps that solve different problems. One category helps you get there and stay aware; another helps you understand how well you sailed. Most sailors end up using one app from each category they need, not one app for everything.

The main categories

Navigation and charts

For chart detail, route planning and a backup to the chartplotter, navigation-first apps lead. Common choices:

• Navionics Boating: one of the best-known marine navigation apps, valued for charts and plotting by cruisers planning passages.
• iNavX: a more traditional charting tool with broad chart support and external instrument integration.
• Savvy Navvy: simpler, more modern route planning.

Weather and routing

Weather shapes every session.

• Windy: visual forecasts and wind models, a favourite for deciding when and where to sail.
• SailGrib WR: weather routing and passage planning for offshore use, where GRIB files and route optimisation matter most.

Racing replay and tactics

• RaceQs: known among racers for track replay and race visualisation: starts, mark roundings, fleet positions and tactical choices.
• Vakaros: for sailors using Vakaros instruments, purpose-built race timing and instrument data on the boat.

Awareness

• MarineTraffic: AIS-based vessel tracking, useful for situational awareness in busy waterways. See Live tracking vs AIS.

Fitness platforms

Garmin Connect, Apple’s Workout app, Suunto and Strava log sailing sessions inside a broader training picture: GPS, heart rate, history, social sharing. Useful, but they don’t understand tacks, VMG or sailing angles. See Waterspeed vs Strava.

Performance analytics

This is the category for sailors who want to improve: record sessions, break them into meaningful events and compare efforts over time. Waterspeed is built for watersports rather than adapted from running or cycling: best speeds over time and distance, automatic tack and gybe detection with speed loss, foiling efficiency, personal bests, live tracking and, with Ultra, VMG, true wind angle, legs and runs, and polar charts. It works with Apple Watch, Garmin, COROS, Suunto, Wear OS and Vakaros.

What to look for in a performance app

1. Data quality. GPS precision, recording rate and how the app handles signal loss. Weak data gives false confidence fast. See How accurate is GPS on the water?.
2. Speed metrics that hold up: sustained speeds, not only the peak.
3. Manoeuvre detection: tacks, gybes, accelerations and efficiency through transitions. This is where purpose-built apps pull away from general fitness products.
4. Live tracking and safety tools, especially if you sail solo or offshore.
5. Device support. Plenty of sailors don’t want an exposed phone on board; watches and marine hardware need to work.
6. Battery and reliability on long sessions, and quick sync afterwards.
7. A review that changes your next session.

How to choose

Start with your main use case, not the marketing:

• Coastal cruising and passages: a navigation app plus a weather tool.
• Club racing: countdowns, replay and tactical review, plus performance analytics for training.
• Training and progression: performance analytics with manoeuvre detection, session comparison and device flexibility.
• Occasional sailing: almost any working tracker will feel acceptable. Once you care about your lines, transitions and consistency, app quality starts to matter a lot.

The real test

The best app isn’t the one with the longest feature page. It’s the one that records reliably, works with your devices, gives you useful feedback and fits how you sail. A good analytics app shows you when you overcooked the start, where speed dropped in manoeuvres, whether your line choice paid off, and how this session compares with the last ten. More data isn’t always better; better questions are.

To make the most of it, see How to analyse a sailing session.