If it's a matter of tip, then I'd say you should check Google Material Design [1] and Apple iOS Human Interface Guidelines [2]. User Experience is a complex th

If it's a matter of tip, then I'd say you should check Google Material Design [1] and Apple iOS Human Interface Guidelines [2]. User Experience is a complex thing and people spend years studying what it takes to create good design and experience. Well, unless you have natural talent that allows you to feel it. Anyway, check those two links above. They will tell you main guidelines which would help you to create simple, but at least not ugly app.Besides that you might want to check websites like Dribbble.com or Behance.com for inspiration. [1] http://www.google.ru/design/spec/material-design/introduction.html# http://www.google.ru/design/spec/material-design/introductio... [2] https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/ https://developer.apple.com/library/ios/documentation/UserEx...