No, there is no paid subscription required. As far as I know, Withings does not even offer a paid subscription. The app comes with the device.

The reason for you not seeing the PWV is that the FDA (but not the EMA here in Europe) considers PWV a biomarker, which requires a medical-grade device for its measurement. The Withings scale won't be a medical device in the foreseeable future. Device registration is a very expensive process that would blow the end-user price out of the boundaries of affordability.

But the scale still records the PWV. The Withings algorithm then translates it into a range of vascular age (optimal, normal, and not optimal. This range, however, is too broad and the algorithm too insensitive to be used for daily monitoring.

With our LiLo application we pull the PWV data from the Withings server onto our own server (via API integration). We then use the raw data to translate the Withings PWV into a rate-of-aging score, the fluctuations of which we evaluate with the N-of-1 method for single-subject experiments to monitor the effects lifestyle interventions. All that is lay-user capable for DIY lifestyle medicine. You can also access the raw PWV data on our LiLo site.

If you want to discuss your participation as a beta-tester further, (free of charge, no strings attached) I suggest you contact me through our website’s contact form (https://www.adiphea.com/en/solutions/contact/). Your enquiry will land directly in my e-mail. Nobody else will see it.