This device tracks all-day activity, including steps, distance, hourly activity, active minutes, and calories burned. In addition to tracking your sleep, it can set silent alarms that wake you by buzzing on your wrist. The battery can last up to five days without constant charging. It can also record workouts like walks, swimming (it's water-resistant up to 50 meters), and bike rides with SmartTrack. You'll get call, text, and calendar alerts as well.
Promising review: "I can’t say enough good things about this fitness tracker — Fitbit finally got it right with this model. It does everything I want and more. I have had several Fitbit models, some I liked, some I didn’t, and also an Apple Watch, but this is the fitness tracker that works best for me. Slim design that I can wear all day and night without irritation. I do take it off to shower but you don’t have to, as it is waterproof to 50 meters. To test that, I have been wearing it in the pool for my water aerobics classes and it works great! What I love best about this design is that it shows me the time and my step count...really all I care about. Bonus things are that it shows the date, my heart rate, calories burned, and a few other things I haven’t looked up yet, lol; all by simply tapping on the face. It goes several days without needing to be charged and when it does need it, it recharges quickly. Really happy with this and recommend highly if you, like me, are on the road to wellness." —SoozeSays
Get it from Amazon for $68.99+ (available in five colors).