We built the coach we could not find.

We are Hendrick and Bob. We run trails, and learning from experience, we conceptualized Trailwise, because we each had a problem the running community kept telling us was normal.

One of us kept getting hurt

Not dramatically. In the ordinary way. A niggle becomes a week off. A week off becomes a rebuild. The rebuild ends in the same niggle, a few months later, and you start again slightly slower than last time.

Every plan Hendrick tried was good at saying what to run and useless at saying when to stop. They all reacted at the same moment: after the injury, when the only remaining option was rest. None of them said anything in the ten days beforehand, when the signs were already there and there was still a week worth saving.

He did not want a plan that noticed injuries. He wanted one that noticed the week before.

The other could not leave

Bob had wanted to change watches for years. He never did. Not because the new one was worse, but because switching meant walking away from everything behind it: years of runs, sleep, resting heart rate, the slow honest record of getting fitter and getting older.

The data was his. Getting it out in a form that still meant anything was somebody else's decision. So he stayed on hardware he had stopped enjoying, which is a strange place to end up in a sport that is supposed to be about freedom.

It took us a while to see it was one problem

These look like different complaints. They are the same one wearing different clothes.

Both come from a world where your training history belongs to a platform instead of to you. If the record is scattered across apps and broken every time you change brand, nothing can look across years and notice the drift that arrives before an injury. And if nothing can look across years, you are stuck with whichever brand you happened to buy first.

Fix the record and both problems become solvable. That is the entire idea, and it is why the first thing we built was not a coach. It was the place the history lives.

What we decided that meant

Bring any device, and keep the history when you leave it. Treat staying healthy as the foundation the plan is built on rather than a warning that arrives too late. And show the reasoning, every time, so a change to today's session comes with the inputs behind it instead of a number and a shrug.

None of that is exotic. It is mostly a refusal to do the convenient thing, which is to hold your data hostage and call it an ecosystem.

If you are the runner who keeps rebuilding, or the one still on a watch you have outgrown, you are who this is for.