See your full potential.
Rephorm is the first AI health and fitness agent. It reads every signal your body gives off, writes your plan, and coaches you to the body you can actually build.
Trusted by over 5,000 athletes
How it works
It starts with your data. Then it never stops learning.
Connect
Apple Health, Garmin, WHOOP, Oura, Strava and ten more, plus everything you log in the app.
See
One score for strength, endurance, recovery and consistency, with the gap to where you could be.
Train
The agent writes your training and nutrition from your goal, history and recovery. Not a template.
Adapt
Every session and every night of sleep changes what it tells you next. You approve each change.
The app.
Every screen below is live. Drag the body. Tap a muscle. Accept the plan change.
Strength, endurance, recovery and consistency in one number that updates every day.
Eighteen muscle groups, each with its own recovery window from the load you actually did.
Fitness Index 77 · +6.8
Selected-period change: +6.8 points. Latest Fitness Index: 77.0 out of 100.
Strength-biased
Log a session and get progress, fatigue and readiness back in seconds.
Training and nutrition generated from your data, recalibrated as your body changes.
Review performance and recovery before progressing the next push session.
Every change arrives as a diff. Accept it or don't. Your plan never moves behind your back.
A signal after every session
Log a workout and get a fatigue and readiness read straight back. Per muscle, whole body, no waiting for a weekly check-in.
Rephorm, inside Claude and ChatGPT.
Add Rephorm as an MCP server and your assistant can read your Index, recovery and plan, log workouts, and message your coach. Every call is permissioned, visible and revocable.
Plan a week around a work trip in Claude and it already knows your chest is still recovering.
Read your numbers, then act: log a session, accept a plan change, send a note to your coach.
Claude, ChatGPT, Claude Code, Cursor and whatever ships next.
"What's my Index this week and what moved it?"
"Can I train chest today?"
Sets, loads and targets, walked through set by set.
"4 × 8 back squat at 225, felt like an 8."
Coach proposals as diffs, accepted from the chat.
On a coached plan, notes land in your coach's inbox.
Your membership includes so much more.
What could cost $540 a month
is now $8.33
Fitness Index. Recovery. Coach.
4.9 on the App Store · 12,000+ athletesRephorm membership
See your full potential, then get a plan that moves it. Retest your Index every week and watch what changed.
- Fitness Index, updated daily
- 18-muscle recovery map in 3D
- Training and nutrition plans from all your data
- Coach with biometric memory, changes as diffs
- Apple Health, Garmin, WHOOP, Oura, Strava and more
- MCP access for Claude and ChatGPT
Athletes on Rephorm
Real numbers from the beta.
Index 52 → 74"I thought I was overtraining. I was under-recovering three muscle groups and over-fuelling."
Fitness Index 52 to 74 in ten weeks
Marathon −11 min"Garmin told me my training load. Rephorm told me what to do about it."
Marathon PR by 11 minutes
Back squat +35 lb"I ask Claude if I can go heavy and it checks my quads first."
Back squat up 35 lb
HYROX 1:12"Plan changes come as a diff. I accept them or I don't. I finally trust an app with my program."
HYROX 1:12, a PR
Questions
What makes Rephorm an agent and not another fitness app?
An app shows you data. An agent reads it, decides, and acts. Rephorm aggregates your logs and wearables, builds your plan, watches your recovery, and proposes changes you approve. It also works outside its own walls, inside Claude and ChatGPT.
What is the Fitness Index?
A 0 to 100 score combining strength, endurance, recovery and consistency, normalised to your goal. It updates daily with a breakdown of what moved it.
How is muscle recovery estimated?
Each of 18 muscle groups gets a recovery window from the load, volume and RPE you logged, adjusted by sleep and HRV where connected. It is an estimate, not a medical measurement.
Which devices connect?
Apple Health, Garmin, WHOOP, Oura, Strava, Fitbit, Polar, COROS, Suunto, Wahoo, Withings, Peloton, Zwift, Eight Sleep, MyFitnessPal and Cronometer. Anything else flows in through Apple Health.
How does the Claude and ChatGPT integration work?
Rephorm ships an MCP server. Add it to Claude or ChatGPT, approve the scopes you want, and your assistant can read your Index, recovery and plan, log workouts, accept changes or message your coach. Every call is visible and revocable.
Can I cancel anytime?
Yes. No fees. Your membership stays active to the end of the paid period.
Find your form.
Your baseline takes ten minutes. The agent takes it from there.
