Currently, many teenagers have unhealthy life and spend all times on smart devices. It make their health and life badly. Most of them using mobile phone, tablet or laptop too much just to play game or watch video, because of that, they can have many diseases like eyes pain or headache. It can even waste their times for exercise or family and friends. This is a hard problem to solve. To stop this condition, we have to mangane the time on smart devices, usually exercise or study and if you want to have some fun, hand out is good than use phone. This problem can solve if everyone can know what a good things to do to have a healthy lifestyle.