I wore the the Garmin Forerunner 235 all summer. It's a full-featured fitness tracker that accurately captures all of the details of my workouts, whether I'm running or on my bike. I wear it around the clock, into the shower and while swimming in the ocean, and it tracks my steps and sleep. It has an optical heart-rate sensor and can offer up some complex training data -- including an estimate of my VO2 Max and predicted race times and recovery periods. The battery life is stellar. I charge it about once a week.
There's a specific use case for this Garmin watch, and it fits me exactly: I wanted a watch that that was free from the uber-connectedness of an Apple Watch as I don't need any more distractions. (I also tested the newer and more attractive Garmin 245, which is more refined but also $100 more expensive, and cluttered with more traditional smart watch features.) I think the $230 Garmin 235, which is compatible with both iOS and Android, is a great choice for both casual and hardcore athletes who don't want a phone on their wrist.
$249.99 at Crutchfield
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