$$The chosen topic for my SEP was a Rock$-$Climbing Meetup App $($Name Pending$).$ The App will aid in finding belay partners in a selected area. It will also function as a coordinating and planning tool for outdoor adventures. The App will feature user defined filters for climbing type, equipment, experience level, challenge level and user bio$$s as well as group outings and events."

Which do you think is the best approach for this type of project, agile or waterfall? Please support with a comprehensive explanation. Thanks!