If you like these daily Bing wallpapers and would like to save them for offline use, simply enable the “Autosave” feature. If you want to, you can also configure it to set the same image as the lock screen wallpaper. The app automatically downloads a new Bing image and sets it as your desktop wallpaper. The good thing about this app is that it is free, no-adware, and you can do the one-click installation from Windows Store. If you are using Windows 10, Dynamic Theme is one of the best apps to automatically set a new desktop wallpaper every day.