It depends on how polished you are looking to get and how much experience you have with Photoshop/Illustrator and general front-end development.
If you are simply looking to get some iOS experience, you should be able to hack together the UX/UI yourself. If you are trying to launch a business, design will be imperative for success. Show me 1 poorly designed, truly successful App in the App Store.
Like everyone says now-a-days... I'd suggest focusing on the MVP concept and build just the core features, with excellent design and UX.
If you are simply looking to get some iOS experience, you should be able to hack together the UX/UI yourself. If you are trying to launch a business, design will be imperative for success. Show me 1 poorly designed, truly successful App in the App Store.
Like everyone says now-a-days... I'd suggest focusing on the MVP concept and build just the core features, with excellent design and UX.
For inspiration: http://pinterest.com/timoa http://www.mobile-patterns.com http://pttrns.com http://www.lovelyui.com http://iphone.meer.li http://www.awwwards.com/inspirational-and-useful-resources-f... http://uxarchive.com