The AI training assistant for runners and busy coaches.
Get personal, science-backed running guidance, train consistently, and work in sync with your coach to reach your goals.
No card needed. Set up in minutes.
AI running coach for runners, built to save their coach time
Sync all activities and recovery metrics to KULG from
Coming soon
Understand your training and recovery. Bring your own AI key.
Get instant, evidence-based guidance on your training and recovery, considering your specific context - right inside KULG App. Available to all runners, with deeper AI insights for subscribers. The more context you provide, the more personalised the feedback, helping you train consistently toward your goals every day. KULG training assistant considers your training history, workout notes, recovery metrics, performance and physiology, injury history, personal bests, and goals to help you understand your fitness, training load, and progress over time. You can also bring your own AI provider's key to power the assistant.
3 steps to reach your goals
Sync, add your coach, and reflect
Bring your entire training and recovery history to KULG with fully editable activities that sync seamlessly through integrations. Fill in your athlete profile and add your coach to collaborate. Add notes on how each run felt. The more you reflect, the more insights KULG training assistant provides, detecting patterns to help you strike the right balance between stress and recovery. It's the same balance that keeps you consistent instead of sidelined.
Step 1
Zoom out, dig deep, and know your next step
KULG turns your training and recovery data into a clear, bigger picture of your performance and what you need to improve. It's what your coach relies on to check in on you and plan your next activities, without having to ask. Filter by activity type, time frame, or tag to see exactly what changed and why. Runs are automatically categorised, intensity detected, progress visualised. KULG flags issues before they turn into setbacks, and subscribers get weekly and monthly AI insights.
Step 2
Set goals and go after them with a plan
Achieving your big running goals begins with setting the right weekly and monthly milestones toward your target. KULG offers personalised AI training plans validated by a real running coach as an add-on to the Runner subscription. If you already have a coach, you can collaborate on goals and plans together — from longer training blocks down to individual sessions. Coaches can plan for different groups at once, sending weekly individualised plans in bulk.
Step 3
Join KULG Run Club
KULG Run Club is for runners of all experience levels, from beginners to more experienced athletes, who want to build consistency, technique, and long-term progress in running. Training plans and coaching are tailored to the needs and goals of each runner.
Use free, or subscribe for no limits
Try the Runner or Coach plan free for 14 days. No card required. Continue free or upgrade. Cancel anytime.
We accept payments
Built by runners and coaches
See how KULG already helps over a thousand runners stay consistent and reach their goals.
-
![Tarvo Sikka]()
Tarvo Sikka
KULG has made it easier to keep track of my training volume, monitor changes, and see my overall progress in running. This enabled me to cut over 10 minutes off my marathon time and reach my goal of running a sub 3 hour marathon.
-
![Image of Piret Reinik]()
Piret Reinik
KULG offers a different perspective to running. I can see what I'm doing and how I'm progressing and everything is visible from the graphs for both me and my coach. Seeing my training history over the years, I was able to track down what I did differently when I was developing faster.
-
![Marek Truumaa Profile]()
Marek Truumaa
I use KULG for mainly two reasons. In addition to its great overview of running form progress (HR vs speed and feeling vs perceived effort), another reason I use KULG is that my coach has access to my training data and provides accurate feedback without me having to send him anything.
-
![Image of Ilmar Rillo]()
Ilmar Rillo
Using KULG gave me the confidence I needed before my last marathon, where I ran a personal best of 2:50. Seeing my progress clearly laid out in the graphs helped me trust my training and head to the start line feeling prepared. Highly recommend it!
-
![image of Kristin Kirshtein]()
Kristin Kirshtein
It’s incredibly motivating to have an overview of my running progress over time. Even the runs that don’t go that well morph into something valuable when you zoom out and understand the progress you’ve made in mere months.
-
![image of Piret Kusche]()
Piret Kusche
I love the fact that you can see your running trends over longer periods of time: it is motivating and helps zoom in on areas you need to focus on (e.g. % of runs in lower HR zones, etc.). It also feels satisfying to actually put the run data into the table – it is simple and a sense of accomplishment. Notes about how you feel have been very useful as you review the past runs.
-
![image of Paula Särekanno]()
Paula Särekanno
Using this tool has given me a lot more clarity on my actual results and progress. Looking at data from different apps gives good information, but getting a holistic view of things can have a game-changing effect on your performance and quality of life in general.
-
![image of Egle Jaomaa]()
Egle Jaomaa
KULG is an important tool in helping me cultivate the habit of running — seeing the consistency and effort keeps me on track, allowing me to finetune my goals and strategies effortlessly.
Urmas Randma
Running coach, 300 medals at the Estonian Championships, 55 national titles, 44 athletes with a sub-3 h marathon
“Success in training comes down to great collaboration between athlete and coach, focusing on every detail. Even the smallest things can make a big difference. As a coach, I’m convinced that KULG is the best tool for guiding the training process and I highly recommend it for all runners and their coaches.”
See KULG for coaches
Photo by: Tuuli Saarniit
Latest news
-
KULG is a context-aware AI training assistant for runners and their coaches. It turns your training history, recovery data, and personal notes into guidance that helps you train consistently — no more filling in a Google Sheet at the end of the week for your running coach. They can just open KULG and see it themselves.
-
KULG is often searched for as an "AI running coach," and that's a fair way to think of it. But we built it as an assistant, not a replacement coach — designed to work alongside your own coach, not instead of them.
-
Yes. Coaches use KULG to track their athletes' training and recovery, send weekly plans, define goals and training blocks, and collaborate directly with runners — including athletes on the free plan.
-
No. KULG is built to support the coach-athlete relationship, not replace it — it saves your coach time on admin and data review, giving them more room for the conversations, race-day calls, and individual attention each athlete actually needs.
-
No. KULG works fully on its own for runners without a coach — you still get the AI training assistant, insights, and analytics. If you do have a coach, KULG adds a shared view and collaboration on top, but having a coach is not required to get value from it.
-
A general AI chat only knows what you type into it that session, and there's no way for your coach to see the same picture. KULG's AI training assistant is fully context-aware — it already has your training history, recovery data, and athlete profile (injury history, goals, physiology) built in, plus a running-science knowledge base we keep updating with new research, so answers are grounded in your specific context and current evidence, not a generic guess. And it's the only setup where your coach sees the same data and can plan alongside you, which no standalone chatbot can do.
-
Your watch collects the raw data, and Strava is where you share it socially and browse maps and routes. KULG is where you understand your training and recovery. It's a clean, unified copy of it (like a training diary where you can reflect on your workouts) that feeds your AI training assistant the real context it needs, giving you a science-backed, focused picture of your progress and a shared view your coach can use too. It's built on top of your existing trackers, not a replacement for them.
-
Runna and apps like it mainly generate a training plan for you algorithmically. KULG is broader — it's an ongoing training assistant with daily insights, a shared view for your coach, and guidance based on your actual training and recovery data, not just a plan to follow. The KULG method is built around long-term consistency over simply training harder. KULG’s AI training plan considers your specific context, adapts as your training and recovery change, and is checked by a real running coach before it reaches you.
-
TrainingPeaks is built around structured workout files and performance metrics like TSS and CTL that come from cycling and triathlon, and running coaches often find it more complex than they actually need. KULG is built specifically for runners: your data becomes clear, focused graphs instead of composite scores, and you get a context-aware AI training assistant — not just analytics and planning modules. You don't need to already know sports-science metrics to get value, and it frees up your coach's time rather than adding to their workload.
-
Yes — both the Runner and Coach plans include a free tier, no card required. You can start and collaborate for free, then upgrade either side later for deeper AI insights and more training assistant questions, unlimited training history, and advanced planning.
Train consistently, reach your goals
KULG AI training assistant keeps you on track, and your coach (if you have one) stays in the loop. Get instant, evidence-based guidance on training and recovery tailored to your specific context.
Try Runner or Coach free for 14 days. Continue free or upgrade.
Go with the flow
Flow occurs when the balance between the degree of readiness and the magnitude of the challenge is just right.
In Estonian, KULG signifies "flow," "progress," and "forward movement," capturing our belief in maintaining long-term consistency over simply training harder, real numbers and your feel over derived scores, and getting the basics of training right instead of inflexible training plans.