Duo is an Android lifestyle app developed by ALL Development LLC, offering a unique approach to planning dates. The app introduces the concept of a "Surprise Date," where users answer a short questionnaire and have experts organize a memorable experience. Users receive guidance on what to wear and when to arrive at the location, with the rest kept secret.

Additionally, Duo provides a variety of creative date ideas for users to browse through, inspiring them to plan their own outings. The app also caters to those seeking a change from routine dating by offering "Surprise Dates" tailored to their preferences and budget. Users can also engage in "Group Dates" to connect with couples sharing similar interests.