Bing may not be your top choice, like searching machine, but there's no doubt that it features some of the most beautiful wallpapers. Microsoft recently released an app for the Windows which will allow you to use these wallpapers on your desktop.
As of today, there is an application for android.
To date, the Google Play Store has only been unofficial applications for Bing wallpapers. However, this new application brings the official Bing gallery with extra possibilities.
The app will show you a new image every day that you can set as wallpaper. You can also set the image to change automatically every weekteam or every month.
It also has a section that allows you to explore wallpapers of different categories. You can search by color, country and category.
The application seems to be available in selected countries at the moment, but apparently it is also available for Greece.
Hopefully, the company will add more features to the app soon. Those interested can download it from Google Play store:
https://play.google.com/store/apps/details?id=com.microsoft.biηg.wallpapers