Chat: Type "I weigh 165 lbs" or "weight 74 kg". We log it.
Data entry: Click the + button on any day in the week view.
You can log weight for any date, just say it: "weight 163 on Monday".
What it's used for
Your weight feeds your power-to-weight number (watts per kilogram or per pound). Ask "what's my weight?" or "show my weight trend" to see your history.