Atul Ranjan

Hey everyone I'm Atul, a software engineer and grad student in Computational Science at the University of Vienna.

I've always had this problem with studying with AI: it hands me the answer, I nod along, and a week later I can't do the problem myself. The struggle is where the learning happens, and AI skips it. On top of that, I was constantly juggling screens, from my notes to the chat and back.

So I've been building Pen Buddy, the note-taking app for the AI era. It's a notebook for Mac and iPad with an AI tutor inside it. You write with Apple Pencil or open a PDF or coding problem, and just talk. Buddy reads your page and your handwriting, then gives you hints instead of answers, so you work it out yourself. Every session turns into notes and flashcards.

I'm preparing to launch here soon. Until then, I'd love to hear from you:

Hello everyone!
Writing the first message here, very excited to see your feedback about Pen Buddy!