Napkin

A lifting log that fits on a napkin. Personal PWA for the Weekday Split program (Upper/Lower, Mon/Tue/Thu/Fri).

• Lift: pick a session, weights prefilled from last time, ± steppers, per-set reps. Cards turn green when every set hits the top of the rep range.
• Body: bodyweight, waist, 7-day rolling average.
• Progress: per-exercise history and trend line.
• Backup: JSON/CSV export via the iOS share sheet, JSON restore.

Data lives in localStorage on the device. No accounts, no server, no tracking.

Progression

Double progression: hit the top of the rep range on all sets, add weight (+2.5 kg barbell, next dumbbell up, +5 kg machine). Miss the bottom of the range twice at the same weight, drop 10 %.

Main lifts stop 1–2 reps short of failure; the last set of accessory work goes to failure.

Run locally

python3 -m http.server 8000

Then open http://localhost:8000.

Tests

node logic.test.mjs

logic.js holds all the program and progression rules and has no DOM dependencies.