iPhone app

App specification 1) When app starts, show logo and login screen, for each store, once login, stay login until logout. 2) Multiple login allowed 3) No forget password function 4) Please add a login/password field to existing database (mobile website) and allow change of password through the mobile website (website is written in codeigniter, need you to build change password function) 5) After login, home screen, show a few buttons with appropriate graphics, (a)redeem (b)search (c)statistics (d)logout 6) Redeem 6a) type in due amount, click next, 6b) start camera to scan QR code, once scanned complete, decode and verify with database, 6c) if coupon not valid (invalid string, wrong store, already redeemed, expired), alert user; 6d) if coupon is valid, display final discounted price and confirm to redeem coupon, then mark coupon redeemed in database. 7) Search 7a) type in facebook name or email address to search for coupon. 7b) show result lists, click on each result to see more details in a new page, scrolling to see all results. 7c) detail page include person's name, coupon store, coupon purchased date, coupon expire date, large coupon QR code image 4cm square), NO scrolling, and include 2 buttons, REDEEM and BACK 7d) click REDEEM to enter original amount due and click OK to calculate discounted amount, popup for confirmation with OK/CANCEL options. If OK clicked mark coupon redeemed in database. 8) Statistics - Display statistics of this store, number of sales, number of redemption, simple chart, etc. 9) Logout 10) Sticky menu buttons on bottom of screen for fast access from any page. 11) Testing to 100% bugs free and fast response. NOTE) A) Interface design - modern and comply with the company's colour schemes B) existing database is mySQL, needed to add fields for some functions above.