Huawei Watch GT 5 vs Samsung Galaxy Watch Ultra

“GT5 runs huawei own OS and no access to any google services - so not an option per what you are looking for. In terms of wear os watches you longest battery life is: technically the ticwatch atlas / enduro - standard is up to 5 days, but then extensive use of lcd screen and turning off features (essential modes) can extend it out further - but not a fan of their support or their durability (been issues with both). Then next best is OnePlus Watch 2 (up to 4 days) or Watch 3 (up to 5 days) - however can extend out to up 16 days by switching into their own os - however this takes away all the google services (incl nfc pay) - however only takes about 1 min to reboot back into wear os. Mixed use will generally give you between 5-12 days. Samsung GW Ultra - up to 3 days. For the rest you are looking at 1-2 days depending on model and size of model. Alt: no google services, but do offer their own payment system: Garmin with Garmin Pay; and Amazfit with Zepp Pay (note this is pretty restricted depending on country). For GT5 note that it looks like Huawei may be doing a deal with Curve which then may give them a payment option in some European countries.”

“There areany really accurate smartwatches that measure blood pressure available in the U.S. . None have been approved by the FDA. The closest you can get is the Samsung Galaxy Ultra, but you have to do some serious hacks to import the blood pressure monitor from a European app. I've tried several and the blood press was always off by 20 or 30 points. I checked them using a medical grade blood pressure cuff.”