Train for
the season,
not the mirror.
You’re good at your sport and you’re not doing it full-time. The training that counts is the training that makes your days out better.
Treeline programs for the sport you actually do, around the week you actually have.
Two sessions is a program, not a failure
An RPE on every set. Skipped sets recorded as skipped, not as missing. The days you bailed on, kept as what they were.
Nobody else is building for the middle
Training apps aim at the ends — someone who has never squatted, someone chasing a mirror, someone whose whole day is training. In between there is everyone who is genuinely good at something and fits it around a life.
- Beginners who need a squat taught
- Lifters training for the mirror
- Athletes with nothing else on
- Anyone who wants a coach in their DMs
If that’s you, there are better apps for it, and we’d rather you used one.
- People who have been doing this a while
- People who lift so they ski, run and ride better
- People with a job, a family, and a season they care about
Tell it what your body won’t do. In your own words.
Six questions set the frame: sport, season, how often you get out, what equipment you have. Then you type the constraint, and it comes back with specific swaps and the reasoning behind each one.
Right knee doesn’t like deep squats or high-rep lunges.
“First app that didn’t punish me for training twice one week and five the next.”
“I typed one sentence about my shoulder and it rebuilt the whole block, with reasons.”
“Two years of squats in one chart. That’s the whole reason I stayed.”
Why we called it Treeline
The treeline is the elevation where the trees stop and the terrain you came for starts. Nobody trains for the treeline. You train below it, on a Tuesday, in a garage or a commercial gym, so that the handful of days you get above it go the way you want.
That’s the whole brief for this app: everything that happens down here, in service of what happens up there.
Treeline Fitness is made by a small team at Foundry24. We built it for ourselves first: jobs, kids, a season we care about, and enough training history to know what we wanted a program to do differently.
Before you download
No. You tell it what equipment you have — a full rack, a pair of dumbbells in a basement, a hotel gym for two weeks — and the program is built from that. Change the answer and it rebuilds.