Why do you want to use flowchart in your mobile interface design and screen interface design?
We need flowchart is due to it is a map or true guide in task process. It show us a glance view of all our decisions . Set out all the solution in flowchart and it make us easier to understand the decision made and what other next step we should go.
Flowchart actually start at the top and end / exit at the bottom (round shape), there will be decision making(diamond shape ) such as a question ... answer yes or no , true or fault , between that it will be a arrow show us where should we go,when decision made ,it will move to the next level (rectangle) , normally this rectangle is place that progress sample , add things in , calculation and so forth. Thus , flowchart is using this few "shape" to move deeper or more futher understanding. At the last we will arrive the goal or exit of the task.
Flowchart is important in processing , it make us understand the problem or how we solve it , and bring us go deeper to the task really going on.
How will it help your users to meet interactive goals ?
It's a guide that tell user the direction to the goals , such as mobile icon and information , it show us the massage, eg. user hope to go to he photo , the 1st scene will show home - gallery - photo. This is a flowchart we make before actually launch to the user . We plan all the run way , solution , user test and so forth . Thus ,follow the intruction we make and user can have a clear view to his goals, just like the flowchart (a video clip say- it tell us what to do , don't case why just do it.
Example of flowchart