Mobile application development has a series of steps & tools which help developers to transform an idea into a mobile application. The mobile application is built for specific purposes like some business owners develop a mobile application to serve their target customer batter, some mobile applications built which serve society like social media mobile applications. So the point which I want to explain here is that every mobile application is different from every app there are chances that some features & functionality might be the same but the idea behind it may be different.
Frontend & Backend work simultaneously to deliver an optimum results in all the devices. Mobile UI plays an essential role in the app development process because when users interest in the app the first thing that app users will come in contact with UI. The user interface is a medium that represents your business in front of all the customers so its must be interactive, joyful as well as attract continuously user throughout your app.
Lots of a mobile app development company in USA who has expertise in developing interactive UI of a mobile application. They simply conduct various research& follow the proper protocol of app designing to create UI as you desired.
Here is the list of the best tools to use for your UI designing InVision Zeplin Balsamiq Sketch Figma Flinto