Application for iPhone and iPad for solve navigation problems

Good Morning, I search for a good worker for this app. Every Algorithm will write by me; your work is to write this in the application language. For me it's important to have a worker that give me a good graphic layout of application for iPad iPhone and iMac. The complex of algorithm is medium/low, but is necessary a medium knowledge in trigonometric. It will be necessary a lot of communication between the parts for do a good job !!!!!!!! More details after the end of Auction. BEST REGARS ATTILIO PICCOLO