Made for real life
Work. Family. Training. You make it fit.

Less guesswork.
More good
training.

Fit training around work, family and whatever your week brings. Use your data, change your plan when you need to, and see progress towards your goal.

No blood lactate test needed. Start with the watch data you already have.

30 days of Pro free Β· No card needed Β· Cancel anytime

Read athlete reviews
Example home screen
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
Sound familiar?

Training most weeks. Still not sure it’s working?

You squeeze sessions around work and family. Pick a workout when you have time. Push hard when you feel good. But how does it all fit together? And is it taking you towards your goal?

What should I do today?

Get help choosing a session that fits your goal and the time you have.

What if life gets busy?

Move a session and change your week without losing your way.

Is my training working?

Look back at your sessions and see progress in your own numbers.

You’re already making time to train. A little structure can help you make the most of it.

Real reviews

Real athletes. Real feedback.

Selected store reviews. Longer quotations are excerpted; expand to read in full. App Store β†— Β· Google Play β†—

β˜…β˜…β˜…β˜…β˜…

Understand your Garmin data

Awesome App for every level of athlete. It links to your Garmin data seamlessly and helps to break down all of the data it chucks out, giving you a deep layer of...
Read full review

Awesome App for every level of athlete. It links to your Garmin data seamlessly and helps to break down all of the data it chucks out, giving you a deep layer of insight after every session. Its like having a coach at your disposal whenever you need it. im currently smashing my goals due to this App.

BP
Ben P.
via Google Play Β· Aug 2026
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Coaching support within reach

I always considered having a coach, but I’m not committed enough to invest in that. This app is perfect in the absence of a coach.
JD
JasonDerulonotthatone
via the App Store Β· Sep 2026
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Bring structure to your training

I’ve found this app super helpful for structuring my run training. It gives way more detail and 2-way interface than competitors such as Runna (which I think is good for beginners but...
Read full review

I’ve found this app super helpful for structuring my run training. It gives way more detail and 2-way interface than competitors such as Runna (which I think is good for beginners but is so limited). I thoroughly recommend to anyone wanting support with their training. I guarantee you’ll see progress.

DJ
djllell
via the App Store Β· Sep 2025
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Make training more useful

Cracking app that has really added insight and verity to my running, particularly enjoy the roast my run function!
TH
Tom H.
via Google Play Β· Apr 2026
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Support for self-coached athletes

I’m a self-trained athlete, and this is easily one of the best training apps I’ve used. It’s incredibly close to perfect. The insights and feedback are genuinely useful, especially for managing training...
Read full review

I’m a self-trained athlete, and this is easily one of the best training apps I’ve used. It’s incredibly close to perfect. The insights and feedback are genuinely useful, especially for managing training load and staying consistent without a coach. One small limitation is that the app doesn’t automatically detect duplicate entries when calculating load, which can skew the data. That said, the AI assistant handles this well if you flag it, so there is a workaround. Another feature I’d love to see is clearer guidance on the daily rating scale - for example, labels or descriptions that explain what each score means as you adjust the slider. Overall, a fantastic tool that’s just a couple of refinements away from being flawless.

EK
Ecka71au
via the App Store Β· Apr 2026
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Understand your training

I’ve been coaching myself for the last few years and now having LT at my side to help has improve my understanding of training.
LP
Lostproper
via the App Store Β· Apr 2026
More athlete reviews
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easy to use and helpful analysis . still some bugs but the developers is always available on solving and improving. I did the lactate test on treadmill and seems a good alternative to normal tests. highly recommended App
Ali M.
via Google Play Β· Apr 2026
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AI gives me the ick, but this app is something else. If only it could do the hard work for me.
Richie in Chi
via the App Store Β· Jun 2026
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great App. very helpful for beginning runners. love the roast mode.
Robert H.
via Google Play Β· Apr 2026
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really great app with what I guess has an amazing future ahead of it
Mark C.
via Google Play Β· Oct 2025
Works with
⚑ Strava
⌚ Garmin
πŸ”₯ Wahoo
πŸ’ͺ Polar
πŸ“‘ Suunto
πŸƒ Coros
A plan you can change

A bit of structure. Plenty of room for life.

See how your sessions fit together. Then change the week when you need to. You stay in control.

Choosing as you go

Go for a run?Another hard one?Not sure

A week with a plan

MonEasy session
TueFocused session
WedRest
ThuEasy session
FriFamily time
SatLonger easy session
SunRest
Work runs late on Tuesday

Move the focused session to Wednesday.

Illustrated example week. Your plan will depend on your goal and training.

In their own words Β· Review excerpt
I’ve found this app super helpful for structuring my run training.
djllell via the App Store Β· Sep 2025 β†—
Read more athlete reviews β†’
Your training, in view

See the work. See the progress.

A few useful graphs can tell you a lot. Look back at your sessions, see what is changing, and decide what comes next.

Try it with your data Example screens with sample data. Your numbers and app layout will vary.
01A closer look at your training

Are you getting faster?

Compare similar sessions over time. See how your pace changes at the same heart rate.

Pace at 145 bpm5:20 /km β†—
Week 1
5:40 /km
Week 6
5:20 /km

20 seconds per km faster at the same heart rate in this example.

02A closer look at your training

How does your week add up?

See your training time in one place. Build a week that leaves room for the rest of your life.

Training this week4h 20m

Rest days count, too.

03A closer look at your training

Are your easy days easy?

See how much time you spend at each effort. Check that your sessions match the plan.

Easy70%
Steady20%
Hard10%

An example week, not a target for everyone.

In their own words Β· Review excerpt
It links to your Garmin data seamlessly and helps to break down all of the data it chucks out, giving you a deep layer of insight after every session.
Ben P. via Google Play Β· Aug 2026 β†—
Read more athlete reviews β†’
See what your data means

How did that session go?

See what went well, what to watch, and what to do next. All based on your training and your goal.

Example session review
Threshold Intervals
Tuesday Β· 6 Γ— 4 min Β· Zone 4 Β· 52 min
  • You kept the same pace in all six efforts. You are running 4 seconds per km faster than six weeks ago.
  • Your heart rate rose in the last two efforts. You may still be tired from Sunday’s long run.
  • Keep Thursday easy. You are on track for your half-marathon goal.

Use the data you already have

Connect Garmin or Strava. Your sessions help your coach understand how you train.

See your progress

Compare similar sessions. See changes in your pace, power and heart rate over time.

Work towards your goal

Know what to focus on next, whether you want a faster race or a more regular training habit.

How people use Lactate Training

Plan it. Train it. Talk it through.

Use your laptop to plan, your voice after a session, and WhatsApp when the day changes. Here’s how it can all fit together.

Illustrated examples with sample data and messages. Your screens and coach replies will vary.
01

Your data. Your goal. Your kind of plan.

  1. Bring your training together

    Connect Garmin or Strava, or enter your training data. Add your goal and the time you have. You can add blood lactate test results too, but testing is optional.

  2. Plan on your laptop or in the app

    Use Claude on desktop through the MCP connection, or build your week in the training planner. Include work, family, rest and the sessions you want to do.

Explore the planning tools β†’
Claude on desktop Β· MCP connection
You

Plan around my work trip. I can train on Monday, Wednesday and Saturday.

Or use the training planner
MonWedSat
02

Save the session. Say how it felt.

  1. Give feedback while it’s fresh

    Complete your session, then speak your feedback. Say what felt good, what was hard and anything the watch could not know.

  2. Talk it through in Grill Me

    Open Grill Me in the app for a back-and-forth with your coach. Talk through the session and add the detail behind the numbers.

Voice feedback after your session

β€œThe last two efforts felt tough. I slept badly and had to stop at a crossing.”

Grill Me Β· In-app coach
Your coach

What changed in those last two efforts?

You

My legs felt heavy, but my breathing was fine.

03

Go beyond β€œworkout saved”.

  1. Read the full AI analysis

    See a review of your session using your training data and the context you shared with your coach.

  2. Compare it with previous sessions

    Compare similar runs or rides. Look at pace, power and heart rate to see what is changing over time.

Full AI session analysis

Look at your efforts, pacing and how the session felt.

Compare similar runs

Example pace at 145 bpm

Earlier run5:40 /kmRecent run5:20 /km
04

Let your plan move with your life.

  1. Switch on Auto Coach

    Use your training and how you feel to guide suggested session changes across the next four weeks. Review and agree changes before they happen.

  2. Start the day on WhatsApp

    Get your morning brief and check in with how you feel. Talk through today’s plan, then ask to move or edit a session when your day changes.

Auto Coach Β· Next four weeks
Week 1Week 2Week 3Week 4

Suggested changes. You agree them.

WhatsApp coach Β· BetaMorning brief & check-in
Your coach

Morning! Today’s plan is an easy session. How are you feeling, and does it still fit?

You

A bit tired, and work is busy. Can we move today’s session?

Start with the training you already do.

Bring your data, choose a goal and make the app work for your week.

Easy to get started

Get started in a few simple steps.

Start small. Change things as you go.

πŸ“‹
1
Tell us about you
Share your goal, how you train and what your week looks like.
πŸ”—
2
Connect your watch data
Connect Garmin or Strava so your coach can see your training.
β˜€οΈ
3
Make it fit
See your next session. Move it around work, family or a change of plans.
πŸ“ˆ
4
See what’s working
Look back at your sessions and see your progress towards your goal.
Your first useful step

Start with your last session.

Get the app, connect your training and choose your goal. Look back at a recent session, then start shaping a week that works for you.

In their own words Β· Review excerpt
I always considered having a coach, but I’m not committed enough to invest in that.
JasonDerulonotthatone via the App Store Β· Sep 2026 β†—
Read more athlete reviews β†’
Simple pricing

Choose your plan

Try Pro free for 30 days. Then choose a plan, or stay on Free.

Monthly
Yearly
Free
Β£ 0 /month

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

  • βœ“Training dashboard & readiness score
  • βœ“Garmin & Strava 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£ 9.99 /month

For regular training, clear feedback and a plan that fits your week.

  • 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 people who train more and want more time with their coach.

  • 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
Got questions?

Frequently asked questions

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

Need help with the app, your data or your plan?

Chat with us β†’
The app is built for endurance training, including running, cycling and triathlon. Ask us if you are unsure about your sport.
Connect Garmin or Strava. Other devices can provide activities through Strava where that route is supported. The data available depends on your device and permissions.
No. Testing is optional. Start with the data you already record.
Use Lactate Training to talk through sessions, plan around your week and review progress towards a goal. Explore the tools and choose what helps you.
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.
You can start with your current training and goal. You do not need to understand every chart or have a lab test.