Amazon.com.au:Customer reviews: PROSTECH Smart Scales - Bluetooth Body Fat Analyser. Works with Apple Health for iPhone and Selected Android Devices. Monitor Your Weight Loss with These Digital Bathroom Scales
I use theses scales with the app and have been able to track my weight loss and all the other measurements such as Body fat and BMI measurements. The app and scales are easy to use and seamlessly link via Bluetooth. The digital display is clear and easy to read with or without the app.
I connect them with Apple Health to read alongside my running log. It works with Fitbit too.
The size is perfect, I have owned smaller ones before but these are solid and well designed.