For those who want to have a bottom line impact and have time & money to spare, purchase a scale or a blood pressure monitor from Apple Store online, try to set it up on your phone until you hit the new paywall, and then call and arrange to return it; when asked, explain that it requires a $100/year subscription for Apple HealthKit support and that you’re offended at Apple for omitting that. It’s quite possible that Withings made this change without notifying Apple, and a handful of such returns could lead Apple to pull all Withings products from their sales channels in response. Or it could just be wasted time, and Apple’s fine with it, but there’s no easier way to find out — and this sales channel is probably valuable enough to Withings that losing access to it might cost them their entire projected revenue gains from the fee.