So you have a million-dollar app idea? That's awesome! Oh, did you say you have kickass programming skills to turn it into a reality, too? Amazing! Now, all there is left to do is to design your app to look aesthetically pleasing and make it so easy to use that a five-year-old would have no problem navigating through it.
https://uk.finance.yahoo.com/news/crash-course-ux-ui-design-090000714.html/