Why do you want to use flowchart in your mobile interface design & screen design?
Flowcharts would help in outlining the structure of the functions or the commands and would also help in finding possible flaws in the structure. This would help the designer to minimize the errors and in finding the solutions for it easily.
How will it help your users to meet the interactive goals?
Flowcharts would help in navigating the user through with simple commands to person’s goal. Since the commands are simple the users would not have any difficulties.