I built the coachI wanted to have.
Kracey is one AI coach: it writes your plan, reads your real training data, and adapts as you go. Sharpest on HYROX, and it coaches running and hybrid training too. This page is who is behind it, what it is built on, and what we promise about your data.
Hi, I am Niels. My endurance journey started with a bet to run a marathon under three hours. I finished in 2:53, which surprised me more than anyone, and I signed up for an Ironman 70.3 on the momentum.
As a former national swim athlete and competitive rower I qualified for the Ironman 70.3 World Championships. A month before the race I signed up for my first HYROX, and two months after it I ran a 2:45 marathon. That is where this ended up.
For years I coached myself. Rebuilding old Ironman blocks into HYROX and running plans, copy-pasting everything into spreadsheets, pushing it into my calendar by hand, and researching how to sequence strength without colliding with the cardio. It worked, eventually. It also ate every evening, and I still could not tell you on a Tuesday whether Thursday should be hard.
So I built the thing I actually wanted: a coach that reads my data every day, holds the plan, remembers the context, and tells me when I am about to make a bad call. I have trained on it, raced Pro on it, and it argues with me. Now I want it to do that for other people.
The resultsbehind it.
2:45
Marathon
1:16
Half marathon
1:01:54
HYROX Pro singles
56:18
HYROX Open
4:18
Ironman 70.3 Worlds
#10
HYROX Pro Doubles World Championships
My own results, and the reason I can say the coach is not theory. It is what I train on.
What the coachingis actually built on.
A big aerobic engine first.
HYROX is not a metcon. The plans are built on aerobic base and compromised running, the two things that actually decide the finish, rather than stacking high-intensity circuits until everything feels hard.
Grounded in the research, not in vibes.
The coaching prompt encodes performance determinants, durability, compromised running and the current fueling consensus. It is not a chatbot free-associating about training.
Shaped by real coaching.
The framework behind it comes from being coached, for a year, by working coaches and by an elite Pro athlete, and it shows in the details: plyometric rhythm, run-off-station work, how a block is actually sequenced.
Judged against your numbers.
Your configured heart-rate zones, your splits, your load. Never a generic ceiling, and never an average that hides what a session really was.
What we promiseabout your data.
You are about to hand a coach your training and health data. Here is the short version. The long version, with everything checkable, is on the security page.
Never sold. Never used to train AI models, not by us and not by our AI provider. That is written into the terms, and any future investor or acquirer inherits it.
Your identity never enters the AI pipeline. A request carries your first name and training context, nothing else, and a test enforces that on every release.
Both data stores are pinned to Frankfurt, in the EU.
Ask /memory in the chat to see what your coach remembers, and /delete to erase all of it.
Trust and security has the full detail, including where every byte lives and who processes it.