The latest trend in nature wallpaper is 4K HD. These are high definition backgrounds of the most beautiful places. You can download them for free on the Google Play store. You will love the quality of these images. These backgrounds are available in various resolutions, including full HD, high definition, and 4K. To enjoy them, you can use the MemuPlay app, which is developed by Clay Rock Studio. Its high resolution is 1440 x 900 pixels.