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Switch sailor racing at speed with the crew hiking over the water.

Sailing Performance Analysis Software

The debriefthat finds thefree speed.

kTool turns every sailing session into a visual

debrief — automatically detecting tacks, gybes

and straight-line sections, calculating wind

direction from your GPS track, and synchronizing

performance data with video.

Start free — no cardSee how it works

Sign up and start exploring your own data or a demo session in seconds.

Trusted by Olympic medallists, national-team coaches and competitive sailors

No wind hardware

Runs in your browser

Multi-boat & video sync

Automatic session layout

Drop in a session.Get the whole picture.

Upload a GPS track and kTool automatically organizes the session into maneuvers and straight-line sections. It calculates wind direction from the track, processes the performance metrics and synchronizes any uploaded video with the same timeline.

  • Wind analysis, without a sensor. Wind direction is calculated from your GPS track — no instruments or manual input required.

  • Maneuvers, automatically detected. Every tack, gybe and rounding is detected and timed, so you can jump directly to the moments worth reviewing.

  • Video, automatically synchronized. Add onboard, drone or coach-boat footage and watch each moment alongside the corresponding sailing data.

Sailing session automatically divided into tacks, gybes and straight-line sections in the kTool analysis timeline.

Wind · auto

Read from the track. No gear.

Maneuvers detected

Every tack & gybe, timed.

kTool sailing performance analysis dashboard showing detected maneuvers, straight lines, performance metrics and synchronized video.

Synchronized video overlay

Data and video,side by side.

Watch each maneuver while reading the data from the exact same moment. kTool synchronizes onboard, drone and coach-boat footage with speed, heading, VMG and maneuver data, allowing you to review technique, mode changes and tactical decisions frame by frame.

Discover more features

The kTool difference

No wind instrument needed.kTool works out the directionfrom your GPS track.

Most sailing analysis tools require a wind instrument or manual wind input before they can calculate wind-relative performance. kTool estimates wind direction directly from the geometry of your GPS track. That means you can analyze sessions recorded without a masthead unit and begin the debrief as soon as the track is uploaded.

Performance analysis

Three ways to find the gap.

Comparison of sailing maneuvers performance showing metrics like entry speed, turning loss and acceleration recovery.

Maneuver analysis

Compare any tack or gybe with your sharpest 25%. See where time is lost during the entry, turn, acceleration and recovery, and identify the difference between your best execution and your average.

Straight-line sailing analysis showing speed, angle, height and VMG across selected legs.

Straight-line performance

Analyze speed, angle, height and VMG across every leg. Compare boats, sections or time ranges to understand which sailing modes produced the strongest performance.

Sail Shape Analyzer measuring sail depth, draft position and twist from a photograph.

Sail Shape Analyzer

Beta

Turn a sail photo into measurable shape data. Analyze depth, draft position and twist, then overlay two images to compare changes in trim or setup.

Web-based

No app to install.Every session ready to revisit.

kTool runs directly in your browser. Review a session on your laptop after racing, open it on a tablet during the debrief or revisit it from your phone at the club. Your tracks, maneuvers, metrics and videos remain available whenever you need them.

Sailing session debrief displayed in kTool on a laptop.
Sailing session debrief displayed in kTool on a tablet.
kTool sailing analysis session viewed from a mobile phone.

Data compatibility

Any data. Any class.

Whatever you record

Upload a GPS track and you're in. Add onboard instrument data, wind files or video when available. kTool does not require a proprietary tracking box.

GPS & GPX tracks

Onboard instruments

Wind & sensor files

Session video

Whatever you sail

Use kTool across dinghies, foilers, skiffs and keelboats. Analyze one sailor, compare multiple boats or review an entire fleet within the same session. If it leaves a GPS track, kTool reads it.

Dinghies

Foilers & wings

Skiffs

Keelboats

How it works

From upload to insight in minutes.

01

Upload

Drop in your session. Add your GPS track, wind files, sensor data and videos if you've got them: onboard, drone, any angle.

02

Process

kTool structures the session, calculates the metrics and synchronizes the available footage.

03

Analyze

Compare tacks, gybes, speed, angle and VMG from any moment. Scrub the timeline, rewatch the videos, cut out the leg you care about.

04

Improve

Take the finding back onto the water and compare future sessions to measure progress.

High-performance sailing skiffs racing side by side during a competitive sailing training session.

For coaches

The session was two hours.You saw maybe 30%.

kTool automatically organizes every recorded session from every boat, so you can jump directly to the moments that matter. Compare sailors side by side, track performance changes and combine GPS data with video to build clearer, evidence-based debriefs.

Explore kTool for coaches
Competitive sailor foiling at speed in a high-performance single-handed dinghy.

For sailors

Race againstyour best self.

Your fastest maneuver is already in the data. So are your average ones. kTool places them side by side and shows where the difference appears. Compare technique, recovery, sailing modes and VMG to turn general impressions into specific improvements.

Explore kTool for sailors

Trusted by coaches and competitive sailors worldwide.

“I see in five minutes what used to take me half a regatta to feel out.”
Portrait of Rafa Trujillo

Rafa Trujillo

Australian National Team Coach · Olympic medallist

“My sailors stop arguing about what happened and start fixing it.”
Portrait of Bastian Henning

Bastian Henning

Bavarian Sailing Federation Coach · sailmaker

“The wind read from the track alone is worth the subscription.”
Portrait of Francesco Bertone

Francesco Bertone

European champion · Drylaps founder

“Finally a debrief tool that keeps up with how fast these boats are.”
Portrait of Simone Malagugini

Simone Malagugini

Olympic coach · 10× World titles

Good sailors train hard.The best ones train smart.

You've been collecting data for years. Now it's time to put it to work.

Start free — no card

Upload your own session, or explore a demo the moment you sign in.

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FAQs

Sailing performance analysis software turns recorded GPS, instrument and video data into information that sailors and coaches can use during a debrief. kTool structures the session into maneuvers and straight-line sections, calculates performance metrics, estimates wind direction and synchronizes video to give you a complete and detailed overview of training sessions and races.