Mobile app users are a different breed. They go to mobile apps for different reasons than websites. In sum, they want a faster, concentrated, and more convenient experience. However, since smartphone screens have limited space, it’s not really feasible to include an expansive menu or set of filters to aid in the navigation of an app.
What changes do you need to make to be "mobile first" with your search bar and search results? This Smashing Magazine post shares reasons why virtually any mobile application needs a search bar.
You’re going to find a lot of use for search in mobile apps: