No added Effects in user experience
Flat ux design gets its name from the shapes used. flat ux design employs a distinct two-dimensional style that is simply flat.
The concept works without embellishment in user experience — drop shadows, bevels, embossing, gradients or other tools that add depth. Every element or box, from image frames to buttons to navigational tools, is crisp and lacks feathered edges or shadows.
Nothing is added to make elements look more realistic, such as tricks designed to make items appear 3D in skeuomorphic design projects. Layers used in flat ux design mirror those in other projects, but the planes do not intersect leaving a distinct background image, foreground images or buttons, text and navigation.
So what makes it work? Flat design has a distinct look and feel without all the extras. It relies on a clear sense of hierarchy in the design and placement of elements to make successful projects easy for users to understand and interact with. While more and more websites are using flat design principles, it is maybe even more popular for app and mobile design. With small screens, there are fewer buttons and options, making a flat interface fairly easy to use.