Build me a mobile application for both android and iOS for digital magazine application

Need to build a mobile application on both iOS and Android platforms. This application serves as a digital platform to read magazines. Users can view magazines in mobile or download also. User can subscribe for monthly, quarterly, half yearly and yearly subscription or can purchase a single magazine. No payment gateway required as of now, it will be manual through UPI. Feature/Screens - Login/Signup Page Landing page after login will be Product search page - display All products and users can search for specific also. Product detail page - where all the details related to the magazine are displayed. User can buy subscription or can buy a particular magazine - Under subscription, user can buy any magazine with no charges - Not under subscription, user can buy individual magazine for some price My order page - Where user can view all magazine that he has bought individually or under subscription User profile page to edit user profile - like contact, address, etc. Change password/ forgot password Magazine PDF viewer page - if possible kindle like experience while reading any pdf magazine. This will be the core functionality of the application. User can also opt physical hard copy delivery for some extra charge. User should be able to buy subscription or individual magazine for his family member having different id. There should be a discussion forum page where admin can add discussion thread and user can comment on any thread.