I'm not sure why you'd even want this. As someone who had hypertension, so many factors affect your BP. I could drop mine by 10 points by just taking a warm shower. That's why I had to take it at the same time everyday, and it was a process to do it too. I'd have to sit in my chair in a prone position for 10 minutes or so, slow my breathing, relax, clear my head of thoughts, etc. Once I felt significantly relaxed, I took 3-4 measurements and averaged them all.
Having a heart condition is a very easy gateway to health anxiety. I had to stop wearing my apple watch, my wife keeps the pulse oximeter under lock and key, etc. because I became way too focused on the numbers while ignoring the context. It became a very bad feedback loop.
I don't want to monitor my BP 24/7.