"Taxi Where" mobile app is the Hong Kong's unique Taxi Finder App through Satellite Global Positioning System (GPS). All passengers can find taxies nearby once opening the App. Or all taxi drivers can locate passengers who want to take a taxi. Passengers and taxi drivers can interactively communicate with each other the time and place conveniently. In addition, passengers or taxi drivers can send messages to each other to choose from "I find taxi" or "taxi finds me," for the arrangement in real-time. Please install immediately!