iPhone & iPad app 1-2 screen design with icon

I am a web and mobile application developer. Not so good in design. As my designer friends are busy with their works I thought let's give a try to freelancer.com and find someone who can design my apps. I have a iPhone/iPad dictionary "Arabic English Bidirectional Dictionary" App Link: [login to view URL] It's a very good dictionary with good rating. I need to change the design with something attractive, catchy and user friendly with same features for iPhone & iPad both. If the design is attractive I might ask for designing icon also. If everything goes fine I will ask for design changes of my all other 7 apps in app store. Who have good experience in iPhone/iPad app design can apply for it with portfolio.