I’m still looking for a scale that integrates with Apple Health natively. I haven’t purchased a “smart” scale yet because I don’t want any company having my data since all of the current offerings require you to sync to the respective apps before they will send the data to Apple Health.
The Withings scales directly put their data into the Health app. There is no extra “syncing” step or anything. You don’t even need to open the Withings app as the scale has Wi-Fi and directly uploads the information to Withings servers (which push it down to your phone).
This is way more convenient than any of those scales that require you to use their app with Bluetooth _while_ you are weighing yourself. Here it is seamless… stand on scale… and then the data is in your phone (both in the Withings app and the Health app).