Now on the App Store & Google Play

Race smarter.

Sail faster.

The AI performance coach for competitive sailors. Track every session, analyze your VMG, grade your tacks — and get personalized coaching after every race.

Download on theApp Store Get it onGoogle Play

Free to download · iPhone & Android

Scroll to explore
⛵ Built by competitive sailors
🤖 AI performance analysis
📍 GPS session tracking
🔒 No ads. No data selling.
Features

Everything your
coach needs to know

Tack+IQ turns your phone into a comprehensive performance analysis platform — no extra hardware required.

01 🤖

AI Assistance

Chat with your personal coach after every session. It knows your history, your boat's polars, and your weaknesses. Ask anything — get specific, data-backed answers.

Ask anything
02 📍

GPS Session Tracking

Record every beat and run with high-frequency GPS. Visualize your track, detect laylines, and see where you lost and gained time on each leg.

Built-in GPS
03 📐

VMG & Adaptive Polars

Target % against your boat's polar curves shows how close to maximum you're sailing on every leg. Your polars sharpen automatically the more you sail — generic presets become your boat's real numbers.

Targets that learn
04 ↔️

Tack & Gybe Grading

Every manoeuvre auto-detected and graded A–D based on recovery time and speed loss. See your best tack, worst tack, and trend over time.

Auto-detection
05 📊

Session Comparison

Compare this race to your last 5. See if you're improving in light air, heavy air, or specific point of sail. Spot patterns humans miss.

Historical data
06 ✏️

Manual Log Entry

No GPS? No problem. Log any session manually — wind, legs, tacks, distance, sail config, sea state — and still get full AI analysis.

Offline ready
07 ⚖️

Heel & Trim

Motion sensors track heel and pitch at 5Hz. Find your fast heel band, see how much time you spent over-heeled, and learn exactly when to depower.

Sweet-spot finder
08 🚩

Start-Line Analysis

Drop the line marks, run the timer, and see distance-to-line and speed at the gun, time-to-burn, and whether you were early or OCS. Racers obsess over starts — so do we.

Nail the gun
09 📈

Progress Analytics

A full dashboard of trends — VMG over time, tack recovery, heel vs wind, best conditions, and a session-frequency grid. Watch yourself get faster, race over race.

Training log
How it works

Simple on the water.
Powerful in analysis.

01
Start recording
Tap Start before you cast off. Tack+IQ records GPS, speed, and heading in the background — even with the screen locked.
02
Mark your legs
Tap to start each leg — upwind, downwind, reach. Tack+IQ auto-detects tacks and gybes and grades each manoeuvre in real time.
03
Review your performance
See your GPS track, VMG efficiency per leg, tack grades, and how this session compares to your recent history.
04
Ask your coach
Open Tack+IQ Coach and ask anything. "Why was my VMG lower on the second beat?" "What should I focus on next race?" Real answers, not generic tips.
Tack+IQ live recording screen
The App

Built for the water,
analyzed on shore.

Every screen designed for one-handed use in the cockpit, and deep analysis when you're back at the dock.

Tack+IQ Home Home screen
Tack+IQ live recording screen Live recording
Tack+IQ session history screen Session history
Tack+IQ AI race debrief Your race debrief
Progress Analytics Watch yourself improve
Session Details See where you lost time
Start-Line Analysis Nail the start
Race-day briefing Race-day briefing
VMG Primary metric

The number that actually matters for boat speed

A–D Tack grading

Every manoeuvre scored automatically

0 Extra hardware

Just your phone. No sensors, no Bluetooth

AI Assistant on demand

Available after every session, 24/7

From the founder "

The coach I always wished I had on the water — always available, always honest, always improving.

— Igor S. · Founder of Tack+IQ · 25 years racing

Pricing

Record free, forever.

Track every race at no cost. Upgrade to Pro when you want the deep analysis, multi-boat sync, and your AI assistance.

Logbook
Free
$0
No card required
  • Unlimited session recording
  • GPS track, heel & basic stats
  • Tack & gybe auto-detection
  • Forecast wind + start-line timer
  • Adaptive polars & class presets
  • Race-to-race comparison (basic)
  • Session replay · 1 boat
Race
Pro
$69 / year
≈ $5.75/mo · or $8.99 monthly
  • Everything in Free, plus:
  • AI Session Analyst — debriefs, trends & coaching
  • Condition-corrected VMG (current, gusts, sea state)
  • Full cross-session depth & trend tracking
  • Maneuver quality & cost over time
  • Unlimited boats · multi-device sync · cloud backup
  • Polar import/edit/export · enriched GPX
FAQ

Common questions

Any iPhone running iOS 16 or later (iPhone 8 and newer), and modern Android devices with GPS and motion sensors. No additional hardware, sensors, or Bluetooth devices required — everything runs on the phone already in your pocket.
Yes. Recording, tack detection, and VMG analysis all work fully offline. Wind conditions are pre-fetched before you head out. AI assistance and cloud sync happen when you're back on Wi-Fi or LTE.
Tack+IQ works with any sailboat. For VMG analysis we ship polar presets for popular one-design and keelboat classes. Don't see yours? Tack+IQ builds custom polars automatically from your own sessions over time, so accuracy improves every time you sail.
After each session, Tack+IQ Coach has full context of everything — your GPS track, VMG per leg, every tack grade, wind conditions, and your historical performance across all previous sessions. You chat with it like a coach: ask why something happened, what to work on, or how you compare to your own baseline. Answers are specific to your data, not generic sailing tips.
Your data is yours. We don't sell it, share it with third parties, or use it to train AI models. Sessions are stored locally on your device and synced to encrypted cloud storage tied to your account only. No ads, ever.
The free tier lets you record unlimited sessions with GPS tracking, heel, tack detection, adaptive polars, and basic race-to-race comparison — no card required. Pro is $69/year (about $5.75/month) or $8.99/month, and unlocks the AI Session Analyst, condition-corrected VMG, full trend tracking, multi-boat sync, and polar/GPX export.
Yes — Tack+IQ is live on the App Store for iPhone and on Google Play for Android, and free to download. Questions? Email support@gybedigital.co.
Get the app

Get out
on the water

Download Tack+IQ free on the App Store or Google Play and start analyzing your very next session. Your AI coach is waiting on shore.

Download on theApp Store Get it onGoogle Play

Free to download · iPhone & Android