There are a few things to look out for, before purchasing a fitness tracker its design, is it waterproof, its performance, does it track heart rate, how much data you need, battery life and charging, compatibility, price, etc. Of course, these things will match up to your needs.
A fitness tracker is a device that monitors and tracks distance ran or walked, number of calories burned, heartbeat, and sleep. These devices can be connected (synched) to many devices. It was in the late 20th and early 21st century where improvements in technology allowed monitoring and recording fitness results right from your wrist band.