What we do

Most training plans are built for someone else: a generic runner with a perfect schedule and no life getting in the way. Real training never looks like that. You miss runs. Work blows up. A niggle in your calf makes you rethink the week.

Pheidi builds a plan around your life and adjusts as things change, so you can stop guessing and just run. Pick your race and distance, tell us your experience and your real availability, and you'll get a plan that makes sense, with the science behind every call if you want to see it.

Why I built Pheidi

I'm a runner, and honestly not a fast one. I'm a finisher, not a racer. I love half marathons, and full marathons are their own kind of fun. But every time I trained for a full, I never felt ready.

The problem was never effort. It was life. A vacation, a work trip, a family thing. Something always came up, and my plan had no room for it. Miss a couple of key runs and there's no easy way to shuffle the rest around the disruption. So I'd line up at the start knowing I hadn't trained enough, and the race made me pay for it.

I want to run another marathon. I just don't want to train the way I did before, with a rigid plan that quietly falls apart the first time real life shows up.

So I'm building Pheidi: a plan that bends around vacations, events, and the weeks that don't go to plan, without making you feel like you've failed. It's for runners like me, the ones who live for a long run in the fall, or being out the door for an early summer mile right as the sun comes up, and just want to reach the start line actually ready.

One more thing. I build Pheidi with AI, but I keep it out of your way inside the app. The world has enough AI slop. You get a real plan and a clean, calm interface, not a chatbot bolted onto your training.

John, founder of Pheidi

What we stand for

We want you to feel confident and supported, like you've got a coach who actually knows your situation. That shapes everything:

  • Clarity over decoration. Every part of the app earns its place. If it doesn't help you understand or act, it's gone.
  • Confidence through precision. Consistent, considered, engineered, not decorated. The details are the point.
  • Respect for your time. Fast, scannable, minimal clicks. You check your plan and get on with your day.
  • Science you can trust. Our advice references published research and established coaching methods, and says so.

The runner behind the name

"Pheidi" comes from Pheidippides, the Greek courier tied to the very first marathon. You probably know the legend: he ran to Athens after the battle, shouted that the Greeks had won, and dropped dead.

That story is mostly myth. The real Pheidippides was a professional long-distance runner who covered roughly 150 miles to Sparta and back to ask for help before the battle, an ultramarathon of showing up when it counted. That's the spirit we named the app after: not the tragic collapse, but the endurance, the discipline, and the habit of showing up, one run at a time.

Want the full history, legend versus fact, the Battle of Marathon, and why a marathon is 26.2 miles? Read the story of Pheidippides and the first marathon.