AI-Powered
Intelligent Training OS for Endurance Athletes

Your training
finally has
a brain.

Built to catch overtraining, smash your goals and fit training into your daily life.

M
S
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Thousands of athletes training smarter

Readiness Score
8.6
✦ Optimal β€” Go Hard
πŸƒ
Today's Workout
Threshold Intervals
6 Γ— 4 min Β· Zone 4 Β· 50 min
Check-In Streak πŸ”₯
21
days consistent
LT.ai
πŸ””
Good morning, Marcus πŸ‘‹
Training Readiness
8.6
✦ Optimal
86%
Today's Focus
Build Fitness
You're balanced and ready to push.
πŸƒ
Recommended
Threshold Intervals
6 Γ— 4 min Β· Zone 4 Β· 50 min
Daily Check-In
Physical
Mental
🏠Today
πŸ“ˆTrends
⚑Workouts
πŸ‘€Profile
Works with
⚑ Strava
⌚ Garmin
🍎 Apple Health
πŸ”₯ Wahoo
πŸ’ͺ Polar
πŸ“‘ Suunto
πŸƒ Coros
Thousands
of athletes
4.9β˜…
App Store Rating
24
Languages
2min
Daily Check-In Time
The problem

Most athletes track. Few truly understand.

You log every session and you are still tired, plateaued or injured. The missing piece is not more data. It is intelligence.

Not another workout log. An operating system for your training.

"Train smarter. Avoid injury. Improve consistently."

😀
Overtraining without knowing it
Your body is sending signals. Without intelligent analysis, you miss them β€” until it's too late and you're injured or burned out.
😴
Inconsistency ruining your progress
Life happens. Training breaks happen. Generic plans don't adapt β€” leaving you lost on how to get back on track after a missed week.
πŸ€”
Blind training in the wrong zones
Without zone data, most athletes spend too much time in the grey zone β€” too hard to recover, too easy to improve.
Everything you need

One complete operating system for your training

Fourteen tools that work together, so every decision about your training is backed by data.

It listens
You talk. It takes notes.
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Talk To Your Coach
A real conversation out loud. She knows your last session and what to do next.
Live voice
πŸŽ™οΈ
Voice That Actually Does Things
Ask out loud and watch it happen: open a screen, move a session, edit your calendar.
Hands-free control
βœ…
Daily Check-Ins
Two minutes each morning catches fatigue before it becomes an injury.
Injury Prevention
Physical
7.8
Mental
6.2
Energy
8.5
πŸ’¬
WhatsApp Coach
Log a session or ask a question on WhatsApp, without opening the app.
Beta Β· Chat anywhere
It thinks
It reads your data and tells you what it means.
πŸ€–
AI Session Analysis
Your AI coach reads every session and tells you what it actually means.
AI-Powered Β· Post-Workout
  • βœ“
    Instant AI session breakdown
  • βœ“
    Detect fatigue before injury happens
  • βœ“
    Compare similar workouts over time
  • βœ“
    Clear suggestions for your next session
πŸ“Š
Fitness vs Fatigue Dashboard
Fitness build, fatigue and intensity balance in one screen.
Real-Time Β· Adaptive
🩸
Blood Lactate & True Training Zones
Blood lactate testing unlocks true threshold data and accurate heart rate zones.
Precision Physiology
Z1 Recovery
Z2 Aerobic Base
Z3 Tempo
Z4 Threshold
Z5 VOβ‚‚ Max
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Session Comparison & Progress Tracking
Compare your key sessions with AI and see real gains in pace, power and heart rate.
AI Comparison
  • βœ“
    Pace vs heart rate trends
  • βœ“
    Power and efficiency gains
  • βœ“
    Fatigue vs performance correlation
It acts
It changes your plan and sends the session to your watch.
πŸ€–
Auto Coach
Your plan looks after itself, and always asks before it changes a session.
Full Self Drive
⚑
Workout Generator
Describe a session, get a structured workout, send it straight to your Garmin.
Send to watch
πŸ“…
Smart Calendar
Plan around work, travel and real life, and adapt when it changes.
Life-Aware Planning
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T
W
T
F
S
S
M
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F
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⚑
Strava Segment Hunter
Know when your peak fitness window opens, then strike for a Strava PR.
Strava Sync Β· PRs
πŸ”—
ChatGPT & Claude Connector
Link your training data to ChatGPT or Claude and ask them anything, answered from your real numbers.
Works with ChatGPT Β· Claude
🌍
Train In Your Language
The whole app, and every word your AI coach says, in 24 languages.
24 languages
Simple by design

From first launch to peak performance

Four steps, then it just works.

πŸ“‹
1
Build Your Profile
Answer a quick performance questionnaire about your sport, goals, fitness level, and lifestyle.
πŸ”—
2
Connect Your Data
Sync Strava, Garmin, or Apple Health in seconds. LT instantly imports your full training history.
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3
Daily Guidance
Each morning: a readiness score, today's focus and a workout picked for how you feel.
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4
Track & Improve
Read your AI analysis, watch your fitness curve rise and your zone balance improve.
Simple pricing

Choose your plan

Start free. Upgrade when you are ready. Cancel anytime.

Monthly
Yearly
Free
Β£ 0 /month

Try the real coach with a small monthly allowance. No card needed.

  • βœ“Training dashboard & readiness score
  • βœ“Strava, Garmin & Apple Health sync
  • βœ“2 coach chats a month
  • βœ“2 session analyses a month
  • βœ“2 live voice conversations a month
  • βœ“2 daily check-ins a month
  • β€”ChatGPT & Claude connector
  • β€”Auto Coach
  • β€”Full plan builder
Get started free
Basic
Β£ 4.99 /month

All the Pro coaching tools with lighter monthly limits.

  • βœ“Everything in Free
  • βœ“50 coach chats & analyses a month
  • βœ“A check-in every day
  • βœ“Unlimited blood lactate tests
  • βœ“Auto Coach: 8 plan builds a month
  • βœ“Full plan builder: 2 a month
  • βœ“15 Grill me debriefs a month
  • βœ“ChatGPT & Claude connector
  • βœ“WhatsApp coach (beta)
Start your 30-day free trial
Most Popular
Pro
Β£ 9.49 /month

The complete system, for athletes serious about consistent, injury-free progress.

  • βœ“Everything in Basic
  • βœ“50 coach chats plus 50 session analyses
  • βœ“Auto Coach: 30 plan builds a month
  • βœ“Full plan builder: 10 a month
  • βœ“60 Grill me debriefs (2 a day)
  • βœ“30 voice commands a month
  • βœ“31 workouts sent to your watch
  • βœ“Strava Segment Hunter
  • βœ“Priority support
Start your 30-day free trial
Max
Β£ 14.99 /month

For high-volume athletes who want the coach always on.

  • βœ“Everything in Pro
  • βœ“1,000 coach chats and 1,000 analyses
  • βœ“Two check-ins a day
  • βœ“Auto Coach: 60 plan builds a month
  • βœ“Full plan builder: 20 a month
  • βœ“120 Grill me debriefs (4 a day)
  • βœ“60 voice commands a month
  • βœ“100 workouts sent to your watch
  • βœ“Earliest access to new features
Start your 30-day free trial
Real athletes

What athletes are saying

⭐⭐⭐⭐⭐

I've been running for 6 years and always struggled with overtraining. LT finally gave me the structure to improve without constant injury. The readiness score alone changed how I train.

MK
Marcus K.
Marathon Runner Β· 3:18 PB
⭐⭐⭐⭐⭐

The AI session analysis is what got me hooked. After every run it tells me exactly what I built and what to do next. It's like having a coach in my pocket 24/7.

SL
Sarah L.
Triathlete Β· 70.3 Finisher
⭐⭐⭐⭐⭐

Segment Hunter is addictive. I used the peak fitness window to plan my best Strava week ever β€” 4 KOMs in one ride. Genuinely worth it for that feature alone.

JP
James P.
Cyclist Β· Strava Addict
⭐⭐⭐⭐⭐

As a busy parent training for ultras, this app just gets real life. Missed a session? It adjusts. No guilt, no broken plan. Just keeps you moving forward.

AR
Anna R.
Ultra Runner Β· 50K Finisher
⭐⭐⭐⭐⭐

The zone distribution graphs showed me exactly why I was always tired β€” everything in Zone 3. Fixed it in 4 weeks. My aerobic base is completely transformed.

DM
Daniel M.
Duathlete Β· Zwift Racer
Got questions?

Frequently asked questions

Can't find what you need? We're always happy to help.

Have a specific question about training methodology, lactate zones, or how the AI coach works?

Chat with us β†’
LT works best for endurance sports β€” running, cycling, triathlon, swimming, and rowing. The zone-based AI training principles apply across all of these, and we're continuously adding sport-specific guidance.
Lactate Training syncs with Strava, Garmin Connect, Apple Health, Wahoo, Polar, Suunto and Coros. You can also link your account to ChatGPT or Claude and ask them about your own training data, or message the WhatsApp coach (beta). If your device uploads to Strava, LT can read it immediately.
No β€” blood lactate testing is an optional premium feature. LT works excellently with heart rate, pace-based, and power-based zones from day one. Lactate testing just gives you even more precision.
Garmin and Strava record your activities. Lactate Training interprets them, plans around them, and tells you what to do next. It's the intelligence layer that sits on top of your existing tracking tools.
You get full Pro access for 30 days in the app. After that you pick a plan or stay on the free one.
Yes. You get 30 days of full Pro access in the app first, then you pick a plan or stay on the free one. Cancel through the app or your App Store / Google Play subscription settings at any time. No cancellation fees, no complicated process β€” your data is always yours.
Absolutely β€” beginners benefit most. You'll learn to train in the right zones from day one, build a solid aerobic base, and avoid the injury cycles that derail most new athletes.
30-day free trial Β· No card needed

No guesswork.
No blind training.
Just results.

Join thousands of athletes who train with intelligence, not just intensity. Download free today.

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4.9 out of 5 Β· On the App Store and Google Play