A custom software project has transformed the reMarkable Paper Pro into an interactive replica of Tom Riddle’s diary from the Harry Potter series. Developer Maxime Rivest built the application so that handwritten messages vanish from the display moments after being written, exactly as they did when Harry Potter first encountered the enchanted journal in Harry Potter and the Chamber of Secrets. Shortly afterward, a response appears on the page, rendered in a handwriting style that evokes Riddle’s own script.
How the Illusion Works
The disappearing ink effect is achieved through careful use of the reMarkable Paper Pro’s software development kit, which allows third-party apps to run directly on the device. Rivest’s program captures user input, clears it from the screen, and then draws an AI-generated reply using a handwriting-style font. Because there are no keyboards, chat bubbles, or glowing displays, the entire interaction takes place through natural pen-and-paper writing on the e-ink tablet.
AI-Driven Conversations
Rather than delivering a single predetermined message, the project relies on an AI model to generate dynamic responses, producing a genuine back-and-forth conversation. Users write questions or comments, watch their words fade away, and then receive a fresh reply written in the diary’s fictional voice. The build has circulated widely among reMarkable owners and Harry Potter fans since being shared online, with many pointing to it as one of the most imaginative uses of the tablet’s e-ink and stylus capabilities to date.
A Personal Passion Project
The reMarkable Paper Pro is marketed primarily as a note-taking and e-reading device, not as a platform for interactive fiction, which has helped the project attract considerable attention. It remains a personal build with no official release, and there is no indication that reMarkable had any involvement in its development. Rivest has made details of the implementation available on X and GitHub, opening the door for others to explore similar creative experiments on dedicated e-ink hardware.
Sources: x.com, github.com