Recs.
Updated
If you want a waterproof, relatively inexpensive fitness tracker with changeable bands that can fit almost any wrist, this one is for you.
Specs
Pros
Pro Plenty of notification functions
It can notify you of incoming emails, phone calls, text and calendar reminders from your phone. It has a function for setting and following team goals. It warns you by vibrating if it detects you have been inactive for a long period of time. It has a "find my phone" feature. It can read entire text messages and has horizontal and vertical screen orientation.
Cons
Con Heart rate monitor often inaccurate
Heart rate should always be a linear progression up and a smooth movement down, and this specific model always shows some noise when compared to chest straps like the Polar H7. The noise stabilizes over a 3 mins time, meaning that the reads of both products will eventually be very close, but there is always bound to be some jumping around at first.