Function Health adds Withings scale and blood pressure data

Function Health members can now send readings from Withings smart scales and blood pressure monitors into the Function app, where they sit next to Function’s lab results. The two companies announced the link on Oct. 22 in a press release and said it is live now in the U.S.

Data moves both ways. Function’s 160+ lab results also sync into the Withings app.

What syncs

The Withings partner page lists these readings for the Function app:

• weight, muscle mass, body fat percentage and visceral fat from a Withings scale
• daily blood pressure readings from the Withings BPM Vision monitor

Withings pairs the scale data with Function lab markers such as glucose, HbA1c and insulin. It pairs blood pressure with ApoB, hs-CRP and Lp(a), which are cholesterol and inflammation markers tied to heart risk.

You need an active Function membership and at least one compatible Withings device, Withings says. To connect, you open Connected Apps in the Function app, pick Withings and sign in. After that the readings sync on their own.

What it costs

A Function membership costs $365 a year, charged once a year, per Function’s pricing page on Oct. 30. The page says the membership renews at the price in effect at renewal. It covers 160+ lab tests a year. Members start with 100+ tests at the annual visit and follow up with 60+ tests 3 to 6 months later, Function’s homepage says. Add-on tests such as MRI, CT and the Galleri cancer test cost extra, according to the Withings FAQ.

Function’s site says the $365 membership covers every state except New York and New Jersey.

The launch comes with two offers:

• Withings users get a $30 credit on a Function membership through the Withings app, which brings the first year to $335.
• Function members get 10% off Withings products through the Function app.

Withings says it has more than 15 million users worldwide.

“Your health information should live in one place,” Function co-founder and CEO Jonathan Swerdlin said in the release.

Where Google fits

Function has a separate deal with Google. U.S. users will be able to import Function lab results into the Google Health app later this fall, next to Fitbit and Pixel Watch data. We covered that deal in Google Health’s data deals and in our story on the $180 Fitbit Edge and the Google Health app.

Why it matters: Function tests members twice a year. With a Withings scale and blood pressure monitor, a member can see daily weight and blood pressure trends in the same app between those lab draws. Function results now also show up in the Withings app, and Google Health is next.

What it means for you

One lab value outside the normal range is not a diagnosis, and one high blood pressure reading is not either. A trend over several readings tells your doctor more. The sync works only if you pay for Function and own a Withings device that takes the readings you want.