Send and receive mobile messages. Mobile Response messaging app is a cross-platform Smartphone messenger currently available for iPhone and Android. The app allows you to exchange messages, pictures, audio notes, location, videos and files. Once you have downloaded the application you can use it as much as you want without any hidden cost. Mobile Response messaging app is part of the Mobile Response platform. It could be used stand-alone by sending and receiving mobile messages or be a part of the platform whereas your company could send mobile messages from a system or a web interface.