Create a Mobile Website

hi, i want the app to be developed for both android and IOS. it is for my Hostel. its a simple accounting app which should sync data continuously. I want to manage multiple hostels. for each of them i should be able to create a list of rooms with info about their occupants. like rent, deposits, contact, contact info, photo, parents info etc. ability to add their monthly electricity view. additionally i should be able to check as to whose rent for the month has been collected and by whom. who among the collectors has how much cash. ability to transfer cash among collectors. different levels of access. summery and report generation. regarding the whole information. occupancy management etc. more information will be provided when you contact me.