Of course, the exclusive club that fitness trackers like the Vivofit are supposed to give you entry to is that of the Extremely Healthy. To that end, the $99 Vivofit 3 will keep tabs on your daily movement and sleep, and automatically detect certain activities — for example, running, biking, or elliptical training. It has a battery life of a year and is water-resistant up to 50 meters (the auto-detect feature works on swimming too). The scalloped design I tried on is only one of a number of Garmin's "Style" looks (others have quilted or braided bands), and the company has also roped in designer Jonathan Adler to create his own versions of the Vivofit 3.

Other Vivofit 3 bands look braided and quilted

And for those people who want a bit more tracking out of their fitness tracker, there's the $249 Vivoactive HR. The HR, in this case, stands for heart rate, with an optical heart rate sensor on the underside of the device. It also has an increased GPS battery life (up to 13 hours), the same auto-detect function as the Vivofit for certain activities (though more are covered), elevation sensors, and the ability to receive notifications from your phone. It also looks a lot like a Fitbit Surge, although with a slightly longer face and a busier design. It's a lot more utilitarian than the Vivofit, but then, it is a lot more utilitarian, and it is at least comfortable and relatively discrete — slim enough to fit under the end of a jumper or suit jacket without bulging in an unsightly way. It's no Vivofit when it comes to looks, but at least it has the good sense to be small enough to hide.

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