Smart Brain Phone is a simulation app that replicates the experience of using DX Kamen Rider 555 Phone. The app, developed by Samel Studio, is free to use and available on Android devices.

The app is designed for those who cannot afford to buy DX or CSM, or for those who are simply curious to try it out. The app offers a similar sensation of playing DX on your mobile screen. Although the app is not perfect, it still provides an enjoyable experience for Kamen Rider fans who want to try out the DX Kamen Rider 555 Phone simulation on their mobile devices.