Query is a book tracking app prototype. For this school project the goal was to create a concept and develop a prototype that is perceived as useful, user-friendly, meets a need or solves a real problem. The prototype needed to be able to participate and challenge Grafill’s Visual competition in the category «Digital design». My focus in this project was to make the prototype as user-friendly as possible not only to meet the criteria of the brief, but to also compete with other existing apps that are in the marked.