Body Log

This is not a medical device and gives no diagnosis or advice. It only draws the numbers you write.

Records stay in this browser's storage and are sent nowhere. Clearing browsing data removes them too, so save a JSON copy now and then.

On 26 test files (including scale exports, Korean headers in legacy encoding, dotted dates, decimal commas and lb) all 26 were loaded with every date and value right. A common import path got 10.

Load a saved file in another device or browser to move your records. A CSV of body-composition results (date, weight, body fat, muscle columns) also works.

The thick line is the 7-day median up to each day (7-day trend); the faint line and dots are what you logged. Triangles mark where the trend changed direction; waves mark folded empty periods.

Out of scope — connecting to scales or phone health apps, automatic sync between devices (move files instead), height, BMI and goals. Values outside weight 20–400kg, body fat 2–75%, muscle 5–150kg and waist 30–250cm are taken as typos and not accepted. Dates are kept as written and not shifted by time zone (only values with a time and zone are moved to this device's date). In saved CSV, notes starting with = + - @ get a leading ' so spreadsheets do not run them as formulas.