Dev builds handwriting canvas where AI sees your math notes, plus a Tom Riddle diary mode
whizzkidme · reddit · 2026-09-15
Reddit user whizzkidme unveiled PlotEveryday, a self-built AI handwriting canvas: you write equations, sketch diagrams, and take notes naturally while the AI "sees" the page and interacts with it — solving the awkwardness of typing out or photographing your work to ask AI for help.
Key features:
- Handwrite physics/math problems and get hints and feedback instead of full answers
- Draw diagrams and ask the AI about them
- Free-form notes, doodles, and idea exploration
- Play tic-tac-toe and mini-games with the AI
- A Harry Potter easter egg: the canvas becomes Tom Riddle's diary you can converse with
The app is free to try with your own API key. The author stresses it started as a small useful idea and grew iteratively, doubling as a way to learn AI app development and canvas interactions.
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