I built Biro, a web tutor that puts explanations on an editable whiteboard. You can type a question or add a PDF or photo of your notes. Biro draws labelled diagrams, works through equations, and adds step-by-step notes. Follow-up questions continue on the same board, so you can ask about one part while keeping the rest in view. It is aimed at visual study topics such as biology, anatomy, physics, and maths. The free plan includes 70 typed answers a day, and it runs in desktop and mobile browsers. You can try it here: https://heybiro.com I would like feedback on the board itself: does keeping the diagram and follow-up explanations together make sense, or would you prefer a fresh board for each question? If you try it, I would also love to know where an explanation becomes hard to follow.   submitted by   /u/Ok-Tomato4990 [link]   [comments]