The design of this mobile-supported cooperative writing platform is based on the output hypothesis and technology-supported cooperative writing, which emphasizes the importance of offering students structured input and output opportunities to produce their written work while they are working alone or with their group members on their writing tasks. Besides, it also conforms to the seven standard elements of an effective computer-assisted writing program/platform for beginning writers: drawing tools, inviting pictures and backgrounds, text-to-speech tools, printed-out written works, voice recorder, prewriting prompts and brainstorming areas as well as writing supports.