Basic Structure doctrine limits Parliament's power to amend the Constitution beyond its core identity.
Kesavananda Bharati (1973) established that certain features cannot be destroyed by amendment.
Explain this highlight
Start with what Gemini Notebook already does well
Google renamed NotebookLM to Gemini Notebook in July 2026. It remains a source-grounded research product and offers notes, quizzes, flashcards, reports, and audio or video study formats. Do not switch tools on the mistaken assumption that it cannot make practice questions.
If your main task is gathering sources, asking grounded questions, and producing study aids, try Gemini Notebook first. Check the current rollout and limits for your account before comparing plans.
Basic Structure doctrine limits Parliament's power to amend the Constitution beyond its core identity.
Kesavananda Bharati (1973) established that certain features cannot be destroyed by amendment.
Explain this highlight
Choose Shelf for the reader-to-next-session loop
Add a PDF to Shelf, read and highlight a passage, ask Tutor about that page or a wider collection, make a quiz from the material, and schedule the next reading session with a link back to the page. Your reading position, annotations, saved document chat, and planner item remain in the same workspace.
That connected reading workflow—not the mere presence of AI or quizzes—is Shelf's reason to exist. The free plan lets you try it within usage limits; check the live pricing page for current quotas.
Choose a practice specialist when repetition leads
RemNote, Quizlet, and similar tools are worth testing if flashcards or a dedicated review method are the center of your routine. Shelf offers quizzes and AI flashcards, but its core is the library and reader beside that practice.
1 GB · 1M AI tokens
Deeper library search & longer chats
Choose Notion or Obsidian when your notes lead
Notion is a strong fit for collaborative docs and databases. Obsidian is a strong fit for linked Markdown files and local ownership. Compare their current PDF and AI workflows yourself rather than assuming either lacks a feature.
Basic Structure doctrine limits Parliament's power to amend the Constitution beyond its core identity.
Kesavananda Bharati (1973) established that certain features cannot be destroyed by amendment.
Explain this highlight
Choose a PDF chat tool for a single question
If you only need to ask about one document today, a focused PDF chat tool may be simpler. Shelf becomes more useful when you repeatedly return to a growing library and want reading, notes, practice, and planning to stay connected.
A five-minute test before you commit
Use the same real PDF in two tools. Ask a question whose answer you can verify in the source. Make five practice questions. Then close the app and return tomorrow: can you find the highlighted passage, the answer, and the next action quickly? Keep the tool that fits your repeat workflow.
For Shelf, the key test is whether opening that same page from your library or planner saves you time on the second session. If it does not, a specialist may be enough.
1 GB · 1M AI tokens
Deeper library search & longer chats