Here is another smart scale that lets you track your weight and stay on the right track with your diet/fitness routine. The Fitbit Aria 2 helps you understand your body composition and syncs the data to your smartphone. You can use it to track weight, body fat %, lean mass, and BMI.
Aria 2 can be set up using your smartphone via Bluetooth. It supports 8 different users but keeps your data private. Expected to become available in Fall 2017.