It is an OS11 Classic White7 keyboard theme for Keyboard 7
Classic White7 Theme for Keyboard 7, designed by Keyboard 7, Getting this cool theme to make your Keyboard 7 more lovely and colorful.
☆ This is not a standalone app, you need to download the LATEST version of Keyboard 7 app in order to apply this theme. (Search “Keyboard 7” to download it)