21 surefire UI design rules for instant mobile UX improvement.

There are hundreds of useful guidelines for mobile UI design. And when you consider multiple devices, operating systems and app types, that number multiples pretty quickly.

However, a select few hold the key to positive UX on a small screen, and they apply to every device, every platform, every app. Those are the ones you’ll find here.

This is the stuff that matters most, the things that either make an app the answer to someone’s prayer or cause it to become their worst nightmare.

The rules covered here go a very long way in ensuring that what you design is the former — instead of the latter.