after trying various Fitbit and the ilk, I've settled on a Nokia Steel HR (actually, the earlier Withing branded model) and ... I love it. The fact it looks like a real watch, and the battery goes for about 20 days without shutting down is pretty amazing considering it also includes the whole array of heart rate, sleep etc monitoring.
while it's not a full 'smartwatch' I can do simple notifications on the in-built screen and that's usually enough to let me know if I actually want to pick up my phone.
I'd actually trust Nokia - provided they take their network engineering approach - to be the ones who could build out a persona EHR solution for long term tracking and consolidation (and securing) of my data ... as someone who has moved countries (in total four times!) that challenges of keeping the major records are a frustration, but even having changes from Fitbit to Withing has meant I don't have a good consistent record from my pedometer/HR monitor/scale etc .. that's why this industry will continue to churn without someone less obsessed with lock-in and annual replacement than Apple as the shining star