Design patterns are repeatable solutions to problems. Some of the screens you see on this site are good solutions – but there is a lot of variance in the mobile design world.

iOS focus

Pttrns has big screenshots and a good variety of patterns. (…)

Mobile-patterns tends to focus on social patterns. (…)

Android focus

Android Interaction Patterns has fewer screenshots and tries to actually define patterns with wireframes. (…)

Developing a mobile app is the easy part. Getting that app noticed is difficult. And getting the app to go viral is like winning the lottery. Yet many developers get millions of downloads time after time. How?