Weight tracker
One weigh-in, two clicks: the curve, 7 and 30-day trends and history update instantly. No account needed — or create one to sync across devices.
Tracking that makes the scale useful
Weight naturally fluctuates ±1–2 kg day to day (water, glycogen, digestion). What matters is the 7 and 30-day trend — exactly what this tool highlights instead of this morning's number.
Weigh-in tips: always on waking, fasted, same conditions. Once or twice a week is enough for a reliable trend.
Your data, your choice
By default everything stays in your browser — nothing goes to a server. Want your curve on both phone and laptop? Create a free account and your weigh-ins sync and back up automatically.
FAQ
Will I lose my data if I switch phones?
Without an account, yes: data lives in that device’s browser. With a free account (just an email), it syncs and follows you everywhere.
Why does my weight swing so much day to day?
Water, salt, glycogen, digestion: 1–2 kg swings are normal and don’t reflect body fat. Watch the 30-day trend.
Can I export my data?
It lives in your browser’s localStorage (key bao-weight, readable JSON). CSV export is planned.