1 GB · 1M AI tokens
Deeper library search & longer chats
How to read “best” fairly
Shelf combines a personal PDF library, Docs and notebooks, Tutor grounded in uploads, quizzes, sharing, and a planner. Its free plan includes AI and quizzes within usage limits.
A specialist tool may suit you better if you mainly need one job. Compare the full workflow you actually use, not a feature count.
1 GB · 1M AI tokens
Deeper library search & longer chats
Feature matrix
Here are the jobs Shelf supports and cases where a specialist may fit better:
- Personal PDF library + highlights: Shelf — Built-in reader, tabs, split view, marks on your uploads. Another fit — Choose a dedicated PDF editor when advanced PDF editing is the main job..
- Typed Docs & sketch notebooks: Shelf — Beside PDFs in the same collections. Another fit — Choose a dedicated document editor or handwriting app for deeper editing tools..
- LLM grounded in your library: Shelf — Tutor with RAG, citations, page → library scope. Another fit — Gemini Notebook (formerly NotebookLM) is a strong fit for source exploration, study aids, and Google's connected tools..
- Quizzes from your material: Shelf — MCQ, written answers, photo working, and a review board. Another fit — Choose a dedicated flashcard or spaced-repetition tool for that practice style..
- Planner + reading context: Shelf — Tasks linked to library pages. Another fit — Choose a calendar app for shared scheduling and invitations..
- Share handouts / class PDFs: Shelf — Share Shelf + optional Telegram send. Another fit — Choose a file-sharing service for broader collaboration controls..
- Free plan that includes AI + quiz: Shelf — Free library, Tutor limits, quiz, planner. Another fit — Compare current limits and prices for your own usage before subscribing..
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.
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Tool-by-tool edges
Use these when you are choosing between Shelf and a named product:
- Gemini Notebook (formerly NotebookLM): A strong choice for source exploration, notes, quizzes, flashcards, and Google's connected tools.. Shelf fit — Choose Shelf when you also want a PDF reader with saved highlights, Docs, and a page-linked planner in the same workspace..
- ChatPDF / chat-with-PDF tools: Useful for quick questions about an uploaded PDF.. Shelf fit — Choose Shelf when you want to keep reading, annotations, and saved work alongside Q&A across your library..
- Notion + Notion AI: Flexible documents, databases, and team workflows.. Shelf fit — Choose Shelf when the PDF reader and personal study workflow are your center of gravity..
- Obsidian (+ AI plugins): Local-first linked Markdown notes and a broad plugin ecosystem.. Shelf fit — Choose Shelf when you prefer its built-in reader, Tutor, quizzes, and planner..
- ChatGPT / generic LLMs: General-purpose writing, reasoning, and conversation, including work with uploaded files.. Shelf fit — Choose Shelf when you want saved reading context, annotations, quizzes, and plans organized around your library..
- RemNote / Quizlet / Anki: Practice-oriented tools with different strengths in flashcards, quizzes, and review.. Shelf fit — Choose Shelf when practice should sit beside your PDF library and reader..
- GoodNotes / Notability: Dedicated handwriting and tablet note-taking experiences.. Shelf fit — Choose Shelf for its web library, Tutor, quizzes, and planning; do not expect identical pen tooling..
Compare current plans
Shelf has a free plan and a Premium plan for more capacity. Prices and quotas can change, so check the live pricing page before deciding.
- Free includes the library, highlights, Tutor and quizzes within usage limits, plus the planner.
- Premium expands storage and AI capacity. Compare the current price and limits on the pricing page before upgrading.
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What Free includes (why this matters)
Shelf’s free plan includes a personal library, highlights, Tutor with monthly token limits, quizzes, planner, sharing, and Learn browsing.
That means you can validate the whole workflow before paying — not just upload one PDF once.
1 GB · 1M AI tokens
Deeper library search & longer chats
What Premium adds
Premium expands storage, Tutor tokens, search indexing depth, thread length, relevancy docs, and answer modes. Check the pricing page for current limits and checkout options.
Whether one subscription is better value depends on the tools and limits you actually need.
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
When to pick something else
Consider NotebookLM for source exploration, Obsidian for a local Markdown graph, Notion for team documents and databases, and ChatGPT for general-purpose AI conversation.
Consider Shelf when you want PDFs, reading state, notes, source-linked questions, quizzes, and planning in a single personal workspace.
Next steps
Compare live on /features/shelf-vs-alternatives, check /subscribe for current Free vs Premium, and read individual posts for NotebookLM, ChatPDF, Notion AI, and Obsidian.
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