No account. No feed. No streaks.
Log sets and meals in seconds — and watch every set credit real anatomy on a map of your own body. Everything stays on your iPhone: nothing to sign up for, nothing following you around.
Free · iPhone + Apple Watch · Works with Apple Health
How it works
Three tabs — Train, Body, Fuel. That's the whole app.
Log while the rest timer runs in your Dynamic Island. Your last session is pre-filled, the plate math is done, and PRs are judged honestly — estimated one-rep max, not hype.
A hand-drawn anatomical map of your own body. Finish a session and the muscles that did the work light up — so the week's effort is something you can see, not a number you have to trust.
All the ways you actually capture food — nutrition-label photo, barcode, search, quick-type — with the macros you care about pinned up front.
The promise
Everything you log builds a history you own — on your device, in full, wherever you take it.
There's no account to create and no cloud copy to worry about. Your history lives on your iPhone and in Apple Health — private by architecture, not by policy.
Your data reflects what actually happened. A strong week and a rough one both get recorded the same way — as information. That is what makes the trend line worth reading.
Your full history, one tap, standard JSON. Take it to a spreadsheet, another app, or your own AI assistant. Leaving is easy — that's the point of staying.
Download Principled Fitness, log your first set, and watch the map light up.