iPhone and iPad contact management app

I want to make a contact management app for iPhone and iPad, this app will have below features. the following feature of the app and online simple access detail, please read it carefully and bid. this apps will have two version one free limited version which can handle 500 contacts and another unlimited paid version. Features: - Delete all or selected contacts - Duplicate contact sorted by numbers and can be delete/merge automatically - Duplicates contact sorted by names and option will be delete/rename/merge automatically - Backup and restore option (backup will be in the same device / and can send by email) - User can also register with us for online backup but not mandatory, it just an option. - A page with user login online in it to download back file by URL - After user secure login page user can see downloadable backups file by name, time and date - No file shouldn't replace online or local device (every time backup will be with different name) - Can generate PDF and excel file of the contacts (and can send by email) - About page where application detail in two lines and feedback option App design and webpage design are ready... - Above requirement have to deliver in professional way - no error should be in app - Money will be release after test and hand over source code of the app