How many pages?
Does it has a standard design? Need a designer? Animations?
Do we want it to support user accounts and account management?
Do we want it to manage user schedule and location?
Do we need support for social networks? Like sharing, comments, posting
Is there money transfer, like in-app purchases or trading?
Is the app free or paid? Do we need a trial version?
Do we need an admin panel? Security information?