The Tracker: Apple Watch ($349, originally $399)
The Rating: 4.8 stars
Why People Love It: It's a true all in one device, especially if you already have an iPhone. A devoted Andriod user wrote, "I've never used an Apple Watch before, so I thought I'd give it a try. Boy was I impressed! This watch has a built-in microphone that can hear water running and when it does, it counts down for you to make sure you wash your hands for 20 seconds. It also has exercise goals you can set, and not just the traditional ones. I have one that reminds me to stand and stretch for example. I was really leery about switching over to an Apple watch, but I am sure glad I did. Apple, you have a new convert."