A free program for Android, by ExceedApps.

4K Wallpapers: 4K Backgrounds is a free wallpapers app that will provide you with a large collection of high-quality wallpapers. All the backgrounds are available in a number of different categories, such as animals, nature, people, cars, and more. The collection is constantly updated with new content, so you will not have to download it again.

All the backgrounds are optimized to fit your smartphone screen. This makes the app faster and more efficient. It also allows you to save your favorite backgrounds, so you can easily access them later.

The app is designed to be easy to use. You can choose from the available categories or search for your own.