Long battery life. They stand up to every test and accompany you day-to-day. Between top-level sports and public appearances, live each day like a Formula 1 racer.

There is no GPS. I tested the Alta HR myself, and I can confidently say that its slim design makes it the best-looking Fitbit I've tried. Restricted zone feature.

Accurate location determination. Its simple set-up also makes it a good choice for complete fitness tech beginners. Literally, I found this article helpful.