Hi Philipp, everything you need to know about setting up multiple users can be found on the Withings support page (
https://support.withings.com/hc...ür-mehrere-Nutzer). The scale can be connected directly to the mobile devices via Bluetooth or, what I recommend, via WiFi over your local wifi with processing of the data in the cloud. The data is then immediately available in the Health Mate app on iOS and Android (
https://www.withings.com/ch...).
The Health Mate app definitely works on the Apple Watch, but you can also sync the data with Apple's Health app. Since I don't own an Android device, I can't give any information in this area, but I don't think it should be a problem. From my point of view, the interaction between the smartwatch and the scale only makes sense if you want to use the Health Mate app from Withings as the basis for your health data. With the above-mentioned release of health data on iOS, the app also takes over the ECG information from the Apple Watch.
The highlight of the app, however, is the overview of long-term values, e.g. body fat and muscle mass, which makes much more sense than just looking at body weight.
Anyway, from my point of view, it's a great device that definitely works in the Apple world without any problems.
