The Inspire carries on that accurate sleep tracking, though the base-model band lacks a heart-rate sensor for analyzing your sleep stages (or time spent in light, deep and REM sleep). MORE: Do Sleep Tracking Devices Really Work? Fitbit recognizes that even though I haven't moved, I'm not sleeping.

I like to read my Kindle or endlessly scroll Instagram's Explore feed to calm my brain or slowly wake up. Other devices lump in the time I spend lying in bed, which is not necessarily time spent sleeping. I've tested a variety of fitness trackers and smartwatches over the years, and Fitbit is the only company whose devices consistently nail the time I spend asleep. You can also set goal-based exercises on the band before workouts and see your cardio fitness level, which the base Inspire doesn't offer. You can use the heart rate-based Relax app for guided breathing exercises if your beats per minute are too high.

The Inspire's heart-rate sensor makes more health and fitness features possible, which is why the more expensive HR is worth the premium over the cheaper alternative. Fitbit plans to redesign the app to make it simpler and easier to use later this year. That information is synced to the Fitbit app, which is still one of my favorite fitness-tracking apps. The Inspire also automatically records a handful of workouts, which is useful when I take long, brisk walks around Brooklyn and don't think to record my calorie burn.

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