Water

oz Add

Steps

Date Step count

One entry per day — saving the same date updates it.

Save steps

Units

Data is always stored in metric — this only changes how it is shown and entered.

How much can your coach change on its own?

Your coach keeps learning from your data — if you eat 2,600 kcal for two weeks and your weight doesn’t move, it knows your real maintenance and can retune your targets. This is how much of that it may do without asking. Whatever it changes, it always tells you why and you can undo it.

Coach autonomy Ask me first — suggest every change, change nothing on its own Balanced — make small corrections, ask about big ones (recommended) Full control — retune whenever the data says so, tell me after

Coach preferences

Anything you want the coach to respect that the buttons don't cover — in your own words. The coach reads this with every answer and program change.

Science & sources

Where every calorie, protein and training number in this app comes from — the equations, the safety limits, and links to the research.

Recover lost data

Backup

Your tracking data lives only in this browser (localStorage). Export regularly.

Import from health apps

Apple Health (iPhone): Health app → your picture (top right) → Export All Health Data → you get export.zip. Extract the zip (tap it in the Files app, or copy it to this computer and unzip), then choose the export.xml inside it here.
Samsung Health: Samsung Health → ⋮ Settings → Download personal data, then choose the step_daily_trend….csv (steps) or weight….csv (body weight) file here.

Use on your phone

On this PC, double-click “Start OptimalFit (Phone).bat” in the optimal-fit folder. It starts the server in phone mode and prints the address and a 6-digit pairing code (needed once for the AI coach). Your phone must be on the same WiFi as this PC. If Windows asks about the firewall, allow Python on private networks.

Then on the phone, open the address shown and add it to your home screen:
iPhone: Safari → Share button → Add to Home Screen.
Android / Samsung: Chrome → ⋮ menu → Add to Home screen (or Install app).

Honest notes: your data lives in each device’s own browser storage — the phone starts empty; use Export on the PC and Import on the phone to move it. The AI coach only works while the PC server is running.

Demo data

Generates ~60 days of realistic, correlated fake data (sleep, meals, workouts, body metrics) so the dashboard and insights have something to chew on.

Intro

See the three-step welcome tour again.