Every mobile platform has its own style guide with preferred ways to create common user interface elements, so how do you stand out?
The two main ways: Color and type.
A millions apps and websites use blue and green and red—try something new. Purple, brown, orange, yellow (actually, be careful with yellow.)
The built-in fonts are good—honestly, some of them are great (Avenir, looking at you), but many fail to impress. I mean, how often can we see Helvetica without clawing out our eyes? If you’re working on a website or web app, try something from TypeKit, GoogleFonts, or Fonts.com. If you’re working on a native app, find a good font, buy the proper license, and load that in with your app.
It’ll cost you, but standing out will probably be worth it.