I did most of the design work for our travel app (Room 77), it certainly can be learned especially since there are some well established app design patterns. I

I did most of the design work for our travel app (Room 77), it certainly can be learned especially since there are some well established app design patterns. If you are developing for iOS, most of the built-in libraries look pretty good and you won't need to do a lot of tweaking. I'm not as familiar with Android. Keep in mind that although you can learn graphic design, would your time be better used on other parts of the app? I recommend the following resources: 1) Glyphish Pro icon pack - $25, pretty much everyone uses this high quality icon pack in their apps. 2) Tapworthy - Designing great apps - Great book with a lot of case studies and practical advice on grid based design, etc.