Yes, up to 8 profiles can be created. The data is then visible in the app of the respective user.

Yes, this works. When you set up the scale, you are asked if you want to share it with other users and you can give a total of 8 users access (via email invitation). This way, the data of the others is secret when you open the app. The second option is to use the same access data when logging in. You can then define the main user of the app in your app, but you can also view all the other data.

Only one Smart Phone is paired with the scale.
However, it can invite 7 other users to connect via the application