iOS app iPhone groupon similar

we already have php groupon script. we need an iPhone apps function exactly like the current groupon one, include the barcode scanning. it should support multiple language (change in setting) and cities. Best if u did similar before, we hope to fet finished code within 10 days, 10% bonus will be given if can meet our deadline. 10% escrow once u won. 40% escrow when u show first demo 30% escrow after we summit to app store. 10% release and rest once approve. 10% after release a month for bugs fixed. pls quote bugs fix cost after a month too.