Ralacoaster Inc. is a company that dreams a better and more beautiful world with art expecially paiting. Ralacoaster porvides a mobile platform service that connecs artists and users, which is called 'RALA'. With RALA, Users can request their own portrait or caricuture to artist using smartphone. In Rala there are variety of artists and paintings. So users can easily appreciate lots of paitings and choose what they like for requesting custom painting. For artist, they can sell their talent for painting and make a money by offering custom painting. RALA gives users all about requesting paiting such as chat feature, mobile payment and review.