A must-have app on my phone must be like an assistant who finishes work perfectly according to my instructions. I can’t finish a particular task without their help, but I must the boss who tells them what things are allowed to do or not. Among the apps installed on my phone, one is really useful while driving or being on a trip. Each time, when I give it my destination, it shows me the best route, the cheapest one or the shortest one. So, whether the place I visit is strange or familiar, I never worry about being lost. Besides being a guide, it can also help me call for cabs or take subways with it. It usually recommends me nearby wonderful restaurants and gas stations or charger stations along my route. It can anticipate on my concerns about the trip and solve all the problems at the right time. Sometimes, when I am tired, I talk about interesting things with it using AI through the Bluetooth. This app lets me believe that the era of human-computer direct connection without using the Bluetooth will soon come true.