Maxime Rivest, a Canadian developer, has leveraged AI technology and the reMarkable Paper Pro’s SDK to develop 'Riddle,' an innovative tool that allows users to write messages and receive animated, handwritten replies reminiscent of Tom Riddle’s diary from the Harry Potter series.
- Transforms handwritten notes into AI-generated replies on e-ink display
- Requires developer mode and advanced setup on reMarkable Paper Pro
- Inspired by Harry Potter’s Tom Riddle diary with immersive handwriting effects
What happened
Canadian developer Maxime Rivest has created an interactive AI feature for the reMarkable Paper Pro called 'Riddle,' inspired by the diary Tom Riddle used in the Harry Potter series. Using the tablet’s software development kit, Rivest designed a tool where users write a note with the stylus, which is then converted into an image format and sent to an AI model. The AI reads the handwritten message and crafts a reply that appears on the device in an animated cursive script that mimics the style of the fictional diary’s handwriting.
This technology leverages image-input compatible large language models and integrates APIs from OpenAI, OpenRouter, and Groq, running directly on the reMarkable hardware. Although visually impressive and innovative, the tool currently requires the device to be in developer mode and a technical setup process that involves root access and launcher installation. Rivest also released another related Harry Potter-themed AI experience mimicking the Marauder’s Map.
Why it matters
The 'Riddle' tool offers a unique blend of classic e-ink simplicity with cutting-edge AI interaction, showing new potential for smarter, more immersive content on dedicated e-readers. It demonstrates how hand-written input can be integrated with AI responses without relying on conventional touchscreen or chat bubble interfaces, preserving the authentic feel of writing in a physical notebook.
This project highlights emerging opportunities for device makers to enhance e-reader functionality beyond static reading, paving the way for personalized, context-aware AI companions on low-power devices. While still experimental and limited to advanced users, the response from the community suggests demand for creative AI-driven features that respect the device’s minimalist design.
What to watch next
As adoption of interactive AI features on e-readers grows, it will be key to observe whether reMarkable or other companies officially embrace this style of immersive AI tool in future hardware or software releases. Simplifying installation and ensuring security will be important to transitioning such innovations from developer experiments to mainstream use.
Maxime Rivest plans further development on the 'Riddle' project as well as other themed AI experiences, which could expand the appeal of tablets like the reMarkable Paper Pro as platforms for novel forms of storytelling and personal interaction. Industry watchers should also monitor how partnerships between AI service providers and device manufacturers evolve around image-to-text and handwriting recognition capabilities.