Fitness Evolution / AI personal training
Your form.
Measured.
FevoAI watches each rep, measures how you move, and gives you feedback you can use before the next set.
Lifts squat · deadlift · bench press Build iOS beta, in testing on lifters' phones
A trainer sees the set. FevoAI measures every rep in it.
The camera becomes an instrument. FevoAI turns every frame into 33 joint positions, finds each rep on its own, and reads the positions that decide a squat at the bottom of the movement: knee angle, hip height against the knee, trunk angle, and how long the descent took.
Then it says one useful thing. A set score from 1 to 10, what to work on with a single cue, and the numbers behind every rep for anyone who wants them. No scolding, no folklore, and a check you can answer if you think it got a rep wrong.
Every rep stays on the record. A set becomes measurements you can go back to — this week against last month — so progress is something you can point at rather than something you remember.
Set the phone down. Lift.
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01
Set your camera
Prop one phone side-on, a few metres away. Before anything starts, a readiness check confirms one person in frame, the whole body visible, enough light, and a steady phone.
Nothing records until the checklist is green.
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02
Complete your set
FevoAI follows the movement, counts each rep as you finish it, and measures the bottom position of every one.
Reps are found from the movement itself. Nothing to tap between reps.
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03
Review and adjust
A set score, one cue for what to work on, and the measurements behind every rep. Confirm the count and answer the checks it cannot score yet.
What it can measure, it shows. What it cannot, it asks about rather than guessing.
One set, rep by rep.
An illustrative set of eight bodyweight squats. Switch the overlays, step through the reps, and watch the readout follow the movement.
Overlays
Reps
at depthabove parallel
The figure and the numbers are generated from a fixed example set, not from a recording. Knee and trunk angles come from the figure's own geometry; the depth call uses the hip's height against the knee at the bottom, the same quantity the app measures.
One movement first. An entire training system next.
- 01SquatIn the program
- 02DeadliftIn the program
- 03Bench pressIn the program
Squat first. Same phone, same setup, as each lift joins the program.
The future of fitness is measured.
- 01
Strength is the last part of training still judged by eye. Time, distance and heart rate got instruments decades ago. How you move did not.
- 02
The instrument turned out to be the phone already in the bag: 33 joint positions a frame, every rep, with nothing new on the floor.
- 03
Fevo is Fitness Evolution — a record of how you move that is worth more the longer you keep it.
The camera sees you. The app keeps numbers.
- 01
Feedback runs on your phone
The pose model and every measurement run on the device. There is no account and nothing to sign in to.
- 02
Sessions are saved as joint positions, not video
Each set is stored as 33 joint positions per frame, a stick figure of numbers. Video is kept only if you turn on "Keep my videos on this phone", and then it stays on your phone and is deleted after the period you choose.
- 03
Nothing leaves unless you send it
Sharing is off until you turn it on. A clip is contributed only when you choose to, with a face blur applied on the phone first. Asking the coach sends the question and a summary of your sets, not the footage.
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No ads, no selling data
"Delete my data" in Settings removes everything on the phone and everything FevoAI's servers hold for your installation.
Fitness feedback, not health advice. FevoAI is a general-wellness product for fitness, form feedback, and exercise logging. It does not diagnose, treat, or cure any condition, and it never decides whether you're ready to train. Questions about pain or readiness belong with your physical therapist or doctor, and FevoAI is built to hand you to them well. It is not a replacement for qualified in-person coaching.
The details, in writing. The Privacy Policy, the Consumer Health Data Privacy Policy, and the Contribution Data & Retention Policy say exactly what is stored, where, and for how long.
Train with intention.
Join the FevoAI beta, or bring it to your floor. iPhone, squat from the side to start, invites in small batches as builds are ready. Gyms and trainers: say so in the note and we will talk about what your floor needs.