A coach, not a catalogue.
Tell the coach what you've got and what's in the way. It builds your workout now, then rebuilds it after every session you log.
Free to start · No credit card · Two builds without an account
Build it. Lift it. Read it. Get stronger.
The whole app is those four moves, and every one of them is a couple of taps. Every screen below is the real thing on example data.
Your workout, your gym
The plan you build above is Day 1, already loaded. Edit it, say what to change, take one off the floor, or let the coach draft the next one from your history. The bar is drawn and the plates are named, so nobody does plate maths.
Tap, don’t type
Did it as planned? Logged in two taps. Going set by set? One circle per set, a rest clock, and a PR turns green the moment you hit it.
Today against last time
Every session is set beside the last time you did it: iron moved, best set, PRs. The weights for next time are adjusted before you leave the gym.
Your standing moves when you lift
Where you stand against real people your age, as a percentile and as the age you lift like, your Weyt Age. Sessions done and muscle groups hit as plain counts. And a coach that has read every set, changing your plan when the numbers say so.
Keep this number and make it move.
By continuing you agree to the terms and the privacy policy.
What is weyt.ai, in plain words
What is weyt.ai?
weyt.ai is a free, web-based strength training app with a coach. You describe what you have and what is in the way, and the coach builds your workout; you log your lifts in a few taps, and it shows where you stand: a percentile against real people your age and sex, the age you lift like (your Weyt Age), the sessions you have done and the muscle groups you have hit, and a plan it rebuilds after every session. It runs in the browser and installs on your phone from the browser; not in the app store yet.
What is a Weyt Age, and where do the percentiles come from?
Your Weyt Age is the age whose median strength matches your current bench press and squat, read as a best lift estimate (an estimated one-rep max) from the sets you log, no max-out testing. One bench set is enough for a first number; adding a squat makes it exact. It is ranked two ways: against the general population, using the Cooper Institute bench-press norms published in the ACSM Guidelines for Exercise Testing and Prescription, and against lifters who track their training, using Strength Level community standards. There is no trustworthy squat data for the general population, so your squat is converted to the bench a lifter at the same level would press, and both are scored on that one scale.
Is weyt.ai free?
Yes. weyt.ai is free while it is in beta, with every feature included and no credit card. A paid Pro tier is planned for later; the pricing page says what is planned and what is promised.
Is my data sold?
No. weyt.ai does not sell your data and shows no ads. The workout builder on this page sends your sentence, sex, age and the sets you typed to Anthropic, the company whose AI writes the coach’s replies, to build the plan; the sentence is kept anonymously (no name, email or address) so the builder can be improved, and nothing is tied to you until you sign up. The Weyt Age math itself runs in your browser. In the app, your logged training data is sent to Anthropic only to generate your coaching and workout designs. The coach is AI-generated fitness guidance, not medical advice. You can delete your account and all of its data from Settings at any time.