I built the first AI-integrated study app because copy-pasting passages into ChatGPT was wrecking my focus

Quick story before the link.

Last semester I caught myself doing this every time I read a paper: highlight a confusing paragraph, copy it, switch tabs to ChatGPT, paste it, ask my question, read the answer, switch back to the PDF, scroll to find where I was, lose three minutes, repeat. Twenty times an hour.

By the end of an evening I had a chat history full of detached questions and no idea which paragraph any of them came from. The flashcards I tried to make from those answers were even worse — "explain this concept" with no link to the page or paper that prompted the question. Two weeks later I'd review the card and have no idea what context I needed to even understand it.

Especially as a student that has to constanlty read through papers, I found this problem commonly enough among our peers to build something: every AI study tool I tried was a chat window plus a file uploader. That's not integration. That's a chat window with extra steps. The actual problem isn't "give me an AI." The actual problem is "stop making me leave the page to use one, and stop making me lose track of where my questions came from."

So I built Notie. AI is the foundation, not a feature bolted on top. You highlight a passage in your PDF — text or even a region around a figure or chart — and tap Ask AI. The response streams in next to the highlight, grounded in the actual page, and cites back to specific page numbers like [p.4] so you can click and jump straight to the source. Turn that response into a flashcard with one tap, and the flashcard remembers which highlight, which page, and which document it came from. When you review the card three weeks later you can click straight back to the paragraph that originally prompted it. The connection between question, answer, and source never breaks.

There's also a global Ask AI bar that searches across every PDF and note in your library at once. So when you remember reading something a few weeks ago in some paper but can't remember which one, you ask, and Notie pulls the actual excerpts from the right paper(s) with citations. That cross-document recall was the feature that genuinely changed my study habits — it removed the "where did I read this" tax that was making me re-read instead of actually synthesize.

The frame I keep coming back to: studying isn't a single action, it's an ecosystem. Highlights, notes, flashcards, AI questions, sources — they all need to stay connected to each other. Most tools force you to break the connection every time you switch surfaces. Notie is built so you never lose the thread of where you are.

I'm building this solo. It's live at (https:notieapp.com), free to start. Still trying to gain more user feedbacks to iterate and improve. Would love feedback from this community — especially on the "AI as the foundation, not a feature" framing. Does that land, or does it sound like every other AI pitch? And if you've built or used study tools yourself, I'd genuinely love to hear what broke down for you, especially after testing out this app.