The first models produced easy tasks. For example, acting as a calculator, translator or gaming machine. Modern smartwatches are alike computers.

A fitness tracker is an excellent way to control your exercises and health really easy and accurately. You should treat it as an electronic finger on the pulse. It constantly measures your vitals, quality of sleep and step count see ID115 plus HR manual.

To sum up, the fitness tracker is a small useful device, that will help you to keep fit all the time. It is a real up-to-day technology. Moreover, it can be used underwater.