Leio is a free digital journal for iPhone users, designed to help them track and manage their reading habits. It is primarily based on physical books, but it also supports electronic readers and other devices. The app allows users to organize their libraries, notes, and favorite quotes, while also timing their reading sessions to help turn reading into a habit. With Leio, users can keep track of where they are in multiple books, set deadlines to finish books by specific dates, and plan their reading schedule accordingly. The app also provides accurate predictions on when users will finish a book, and users can set goals for how much and how often they want to read. Leio keeps an extensive record of users' reading sessions, providing statistics and data on their reading habits, which can be exported for further analysis.