ios native app

1) need to sign NDA 2) Basic account creation 3) will be free version and unlock all features with payment or purchasing credits to keep features live 4) will be predefined categories and user can start/post a topic. 5) any user can readonly all content/topics under predefined categories 6) only registered users can post a commnet to topic 7) should be able to communciate to specific users through emails( captured during profiel creation) somehome allowing sending emails between users or initiate personalized chat 8) auto sign and signoff features 9) capture photo and save for profile 10) user can bookmark the topic 11) user can follow the topic with notifications options when someone post to the topic 12) share on facebook ans twitter 13) invite to friend to download the app 14) feedback collection 15) recent posts for that app. Keep some room for discussion and reach me out with any questions