Weighline
For Bluetooth bathroom scales
Step on your scale and the weight is on your iPhone, and in Apple Health if you want: no account, no ads, no pairing.
Today: Xiaomi Mi Smart Scale and Mi Body Composition Scale 2 · iPhone · In development — not yet on the App Store
What it does
- Open the app, step on the scale: the weight appears live and settles, then it is saved by itself
- Sends the weight, and your BMI if you set your height, to Apple Health if you switch it on (free)
- History with a 7- and 30-day chart; swipe to delete a weighing, which also removes what Weighline wrote to Apple Health
- Remembers your scale after the first weighing and ignores a neighbour's scale nearby
- kg, lb or stone; in English and German
- A demo with recorded scale data, so you can try every screen without a scale
How it works
Supported scales broadcast the weight over Bluetooth while you stand on them. Weighline listens for that broadcast while its weighing screen is open. It does not connect to the scale, does not need the scale maker's app and does not use the internet. There is no account, no tracking and no advertising, and nothing is uploaded anywhere: your weighings stay on your iPhone, and in Apple Health if you choose.
Works with
Today Weighline understands the Xiaomi Mi Smart Scale (also sold as Mi Smart Scale 2) and the Xiaomi Mi Body Composition Scale 2. More scales will follow; other brands, for example scales that use the OKOK app, are not supported yet. The first weighing from a new scale asks you once whether it is yours. Weighline shows weight and BMI only; it does not calculate body fat.
Price
Free to download: weighing, the last 30 days of history, Apple Health sync and one person. Weighline Pro is a one-time purchase (no subscription) that adds your full history with the 90-day and all-time chart, everyone in your home, and CSV export. Apple Health sync is never behind the paywall, and Pro never deletes anything: older weighings are kept on your iPhone in the free version too.
Questions owners ask
Can I use my Mi Scale with an iPhone without Zepp Life or Mi Fit?
Yes, that is what Weighline is for. It reads the weight the scale broadcasts, so you need no Xiaomi account, no Zepp Life and no Mi Fit. You do not pair the scale in the iPhone's Bluetooth settings either.
Does my smart scale work with Apple Health?
If it is one of the two Xiaomi scales above, Weighline can write each weighing to Apple Health as Weight, and as Body Mass Index if you set your height. You turn this on in Weighline's settings, and it is free.
Is there an app for OKOK scales without ads?
Not from us yet: Weighline does not read OKOK scales today. If you have one and want it supported, write to us at the address below, so we know which scales to add next.
Does it show body fat?
No. Weighline shows the weight your scale reports and a BMI calculated from it. BMI is a rough guide; ask a doctor about your health. Weighline is not a medical device.
Can the whole family use one scale?
Yes, with Pro: each person has a name, height and unit, and Weighline suggests whose weighing it is from the closest last weight, or asks when it is not sure.
Does it weigh in the background?
No. Weighline listens only while its weighing screen is open, so open the app, then step on.