Hi Product Hunt! I'm Jeonghwan, the developer of UnivNote. I built it around a recurring study problem: when a lecture PDF and handwritten notes live together, reviewing them can involve too much navigation. I wanted the page you're reading, the calculations you add, the solution you hide, and the relevant moment in a recording to stay connected. You can extend PDF margins, keep answers on separate layers, cover material for self-testing, and tap a handwritten stroke to seek within a synced recording. A recent addition lets you set a textbook's printed page 1 as page 1 in the app, even when the PDF begins with a cover and front matter. I chose to focus on responsive writing and clear controls rather than add AI features. The app runs on iPad, iPhone, and Mac; iPad with Apple Pencil is the recommended writing setup. The first 20 notes are free. Unlimited Notes is a one-time $9.99 purchase in the US, with no ads or subscription. If you annotate lecture slides or textbooks, which step in reviewing your notes still takes too much effort? I'd appreciate specific feedback, including what feels awkward in UnivNote.

UnivNote

PDF study notes with layers, without a subscription

PDF study notes with layers, without a subscription