Fit ThisiPhone & Apple Watch
The workout app that grows with you.
From your first rep to your fifth year. Fit This coaches when you want it, gets out of the way when you don’t, and stays honest about what the data can and can’t say.
Free during beta. No accounts, no ads, no trackers — your training data never leaves your phone.
Everything, then more when you’re ready
Built to be simple on day one and deep on year five.
One adaptive engine under a clean UI. Five parts do the work.
Routine builder & 870-exercise library
Program your own splits or let the app suggest them, with muscle diagrams and plain-language technique notes for every movement.
Zero-friction logging
Log sets in a tap on the phone, or start a workout from your wrist and leave the phone in your pocket — with live heart rate on the watch.
Evidence-based coaching
Estimated-1RM trends per exercise, stall detection that changes one variable at a time, and effort tracked as reps-in-reserve — not heart-rate theater.
Gold-star consistency
Streaks counted in weeks, built on habit science. Missing a single day never breaks anything — the calendar encourages, it never punishes.
Trainer mode
Coaches build client profiles on their own device. Each client’s data stays local and separate — Health data always belongs to its owner.
Recovery-aware nudges
With your permission, Apple Health readiness (HRV, resting heart rate, sleep) sits alongside your training load — context, never a verdict.
The guidance dial
Coaching that hands you the controls as you grow.
Most apps pick a side: blank logger or locked-in coach. Fit This runs one engine and lets you set how much it does — then quietly hands over more as your training age climbs.
Starting out
Pick the muscles you want to train; the app recommends exercises, sets, reps, and rest, and does the progression math.
Finding your feet
Take the wheel on programming. The engine steps back to advisor: “bench stalled three weeks — consider a deload.”
Fully in charge
Full manual control with the fastest logging in its class. The coaching is there if you ever want it back.
Honest on purpose
What we won’t pretend.
- ×No “AI body-type plans.” Somatotypes (ectomorph/mesomorph/endomorph) are debunked as a basis for prescription. We program from your training age, goals, and your own logs instead.
- ×No calorie-burn magic. Heart rate is a poor proxy for lifting intensity, and strength-calorie estimates are off by 20–40%. We show volume load and session effort — the numbers that actually track progress.
- ×No streak guilt. An empty week is what raises churn, not a missed day — so a missed day never breaks your streak.
- ×No accounts, no cloud, no trackers. There’s nothing to sign up for and nothing to leak. Your data lives on your device.
Evidence-based coaching means admitting what data can’t say. That’s the whole brand.
Built on habit science
Four sessions a week for six weeks builds the habit.
So Fit This counts streaks in weeks and celebrates showing up — a gold star for a consistent week, and a gentle nudge only when a whole week slips by.
Coming soon to iPhone & Apple Watch
Be first in line for the beta.
Drop us a line and we’ll let you know the moment TestFlight opens. No spam, ever — just one email when it’s time.