If you are on the lookout for a modern wallpaper management application for your Android device that is created according to the latest Material Design 2.0 guidelines from Google, Swift Wall is certainly worth the try. It allows for fine-tuning wallpaper blur levels, applying a grayscale filter, etc.
The newest 5.0 iteration just hit the shelves on the Play Store, after ongoing a very active development / beta testing cycle. With that said, version 5 brings a plethora of UI enhancements as well as a wallpaper download store with some great options to choose from. Another notable change is the refreshed app icon/logo that looks minimal and still well-crafted.