OS Keyboard 18 bring keyboard style to your Android phone. Keyboard apps on OS is a great app, this app will bring all great things to your phone, with dark, light mode, auto switch depend on day/night. Fantastic typing with OS typing sound, impress your friend with OS emoji - that so cool if your friend think you are using latest Phone device, and more cool feature. Beside basic OS keyboard style, we also support many custom keyboard feature: Personalized theme, keyboard background, custom b