- How it works
- Installs as a browser extension (Chrome, Edge, Brave, Arc) and adds highlighting and margin notes directly on the chat pages you already use. Selections collect into a "book" you can export as PDF, HTML, Markdown or PNG.
- What's different
- Covers three assistants rather than one — a thread can move between ChatGPT, Claude and Gemini. Notes stay on the page where you made them instead of in a separate app you have to remember to open.
- Pricing
- Free tier: no credit card, no time limit. Pro is $89/year or $249 lifetime; the first 100 buyers get a $79 one-time Founder Lifetime.
- Best for
- People who use more than one AI assistant every day and keep losing good answers in the scroll-back — researchers, writers, and students who turn answers into flashcards.
- Watch out
- Needs an account. Storage is local by default and cloud sync is opt-in and encrypted (the site says AES-256-GCM), but sync still means the data leaves your machine. Every claim here is the product's own — we have not verified the encryption.