Here is an activity tracker that also serves as a beautiful bracelet. The YOCGEM smart bracelet can count calories and steps. It syncs the data to your smartphone. You can also use it to keep an eye on your phone and monitor your sleep patterns. It is made of 925 sterling silver and Swarovski crystals.
The YOCGEM smart bracelet is available for under $100 at this time. More info is available here.