ipad programmer

i need to develop a "simple" text to speech IPAD (only) application. a user keys in a phrase - and hears it synthesized. the text to speech engine is a web-service. gui has some means to help the user key in faster programmer should be proficient in: 1) ios api in general: using a DB, playing audio, etc. 2) creating fast communication to a server (wifi & 3G) 3) in-app purchase. development is divded to 3 milestones. milestone 2 & 3 are appstore versions. this is a "pay-per-time" project - with weekly builds and deliverable. see detailed design attached