An excellent smart wristband is not only a sports helper but also a good health manager. Alfawise S9 is a choice for you.
Needing regular B.P. measurements is a pain in the ★★★★ but with the S9, it's as easy as pi, (3.14159), Heart Rate, B.P. & Blood Oxygen instantly, well, in 30 seconds at least. Also it's accurate, always useful, eh?