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.
$9.99 once, with no subscription. There is no account, and no ads or trackers anywhere in it: your training data stays yours, synced privately through your own iCloud rather than a Fit This server.
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 — as hands-on or hands-off as you want it.
Routine builder & 873-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.
Recovery-aware nudges
With your permission, Apple Health readiness (HRV, resting heart rate, sleep) sits alongside your training load — context, never a verdict.
A coach you can talk to
Ask in plain words — “a 45-minute push day for my gym” — and Quick Build turns it into a real, editable routine from the same evidence-based engine. It builds; it doesn’t hand-wave, and it runs on your device.
Built around your gym
Tell Fit This what equipment you have, and every routine is built from what you can actually use. Swap any exercise in a tap — it learns your preferences and remembers them per gym.
On your Home & Lock Screen
A Weekly Stars widget keeps your streak in view, and the rest timer runs as a Live Activity on the Lock Screen and in the Dynamic Island — so you can set the phone down between sets.
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 account, no Fit This server, no trackers. Nothing to sign up for, and nothing of yours on our servers — what syncs rides on your own private iCloud, encrypted by Apple.
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.
See it
What it looks like in your hand.
Real screens from the app — scroll through.
Out now on the App Store · iPhone & Apple Watch
Start training with it today.
Fit This is on the App Store now. It is $9.99 once, with no subscription and no account to create. Questions first? Have a look at the FAQ.