Fitness tracker, well – known as activity tracker, is a device that can track down all our movement, steps, distance, running, and calories burned from daily activity we do. It is one of the common talked about items in society nowadays. It provides numerous benefits and fulfilling everyone’s expectation. Many years ago, people didn’t care about their health and live unhealthy lifestyle. They were addicted to alcohol, cigarettes, consume junk food, and too busy to do work out. Not until they were sick, that they cared more about their health, which in some cases, it was too late. In this globalization era, lifestyle has changed, society starts to pay more attention to their health. With advance technology, people started to use activity tracker that is easily used and more convenient. People like to do sports like walking, running and another activity without considering to measure the time, distance, and speed. But do you know how important is it to keep an eye on our activity? Do we know our limit? Do we know how far our body can take? How the sports activity affect our health? What other aspects that we need to improve? We want to know all of this information without doing medical check up. By having activity tracker, we can save time and money to measure by our own without going to the hospital.