iOS app iPhone groupon livingsocial 3

we already have php groupon script. we need an iPhone apps function like the current groupon and living social. it should support multiple language (change in setting) and cities. XML or JSON API is provided. Requirement ========================= 1. you must provide previous working iphone project. 2. you must keep contact with us in skype or msn during the development. 3. this project must be able to finish within 20 days. (included holidays, if any) 4. if you do not have feedback, please don't bid. we will not consider. 5. the apps need to support Both 3GS and 4 in native resolution. 6. it should support paypal payment gateway and credit card payment gateway. Payment ========================= 10% escrow once u won. 40% escrow when u show first demo 30% escrow after we summit to app store. 10% escrow and will RELEASE the payment once approve. so you will get 90% in paid in this stage. the last 10% after release a month later for bugs fixed. pls quote bugs fix cost after a month too.