There are plenty of exhaustive reviews of both the Instinct and the Vivoactive 4 out there, but this isn’t one of them.  I’m just a person who has used the Instinct for a year or so, before switching to the Vivoactive 4 a few weeks ago. I’m a 59 year old guy who rides his bike a bit, goes on hikes, and plays occasionally with running.  In revamping my health over the last few years, my eyes are tragically still…Continue Reading