Design Keyboard is a customizable keyboard app that allows users to create a unique keyboard with various features such as fonts, emoji, themes, GIFs, and photos. With over 100,000 options of photo and GIF backgrounds, users can customize their keyboard with their preferred designs, colors, and themes. The app offers photo themes that can be applied immediately through searching, design themes created by designers, and keyboard fonts support that allows users to change their keyboard fonts.

In addition to its customization features, Design Keyboard also offers smart features such as notes, translation in over 100 languages, English dictionary, web search, and keyboard hotkey support. The app supports various languages including Russian, Korean, Chinese (Traditional), Chinese (Simplified), Indonesian, Malaysian, English, French, Spanish, Italian, German, Portuguese (Brazil), Portuguese (Portugal), Turkish, Arabic, and Vietnamese. The calculator feature allows users to calculate directly with the keyboard and send the equation.

To use the app, users need to grant certain permissions such as Photos/Media/Files, which is required to set keyboard background photo, and Mic/Audio Recording Permissions, which is optional but necessary to use the voice input feature for interpretation.

Overall, Design Keyboard is a useful app for those who want to create a personalized keyboard with various features and smart functions.