Chunk: AI Notebook & Research

Chunk — Your Second Brain, Switched On One AI workspace where cutting edge AI Models from GPT, Claude, and Gemini answer from YOUR notes, PDFs, videos, and research — with citations you can tap. Save anything, ask anything, automate the rest. EVERY FRONTIER AI MODEL, ONE APP • Chat with OpenAI GPT-5.6 (Sol, Terra & Luna), Anthropic Claude Opus 5 & Sonnet 5, and Google Gemini 3.1 Pro • Switch models mid-conversation — no model lock-in, no juggling separate AI chat apps • Free plan includes everyday AI chat, every day ANSWERS WITH RECEIPTS • Connected Chat quotes your own notes, documents, and saved pages — tap a citation, see the source • @-mention any note, document, or collection to bring it into the conversation • Intelligent web search with clear, clickable citations for every fact SAVE ANYTHING FROM ANYWHERE • Capture links, PDFs, screenshots, and stray thoughts into your Inbox — two taps from any app • Clip from your browser or forward emails straight into Chunk • Everything lands searchable, connected, and ready to ask about TURN VIDEOS INTO FLASHCARDS • Convert YouTube videos, lectures, podcasts, audio, webpages, and PDFs into Artifacts: transcripts, summaries, flashcards, quizzes, and concept maps • Build study guides and exam prep from your actual course material NOTES WITH BACKLINKS & A KNOWLEDGE GRAPH • Full Markdown note editor with [[wiki links]] and backlinks — build a personal wiki • Related notes resurface automatically while you research • AI writing tools: grammar, tone, translation, summarizing, creative rewriting DEEP RESEARCH REPORTS IN MINUTES • Cited research reports — from quick outlines to comprehensive deep research • Bibliographies in APA, MLA, Chicago, or Harvard format AUTOMATIONS THAT WORK WHILE YOU SLEEP • Standing agents re-run your research, watch prices and pages, and digest your notes on a schedule • Wake up to fresh, cited digests filed into your workspace YOUR LIBRARY + AI MEMORY • Upload textbooks, papers, and contracts — ask questions across a 3,000-page document library • Organize sources into Collections and chat with an entire project at once • AI memory personalizes every answer — you see, edit, and control everything it remembers CREATE IMAGES — generate visuals for presentations, study aids, and social posts with GPT-Image and Gemini. EVERYWHERE YOU WORK — iPhone, iPad, Mac, and Apple Vision Pro, always in sync. Start on your phone, finish on your Mac. PRIVATE BY DESIGN — your data is never sold and never used to train AI models. Export everything, anytime. Your notes stay yours, free or not. Built for students crushing homework and exam prep, researchers writing cited papers, professionals analyzing documents and monitoring markets, and writers turning reading into output. Free to start — no demo mode, the free plan does real work. Chunk Pro unlocks every frontier model, unlimited deep research, automations at scale, and the full document library, with a free trial on the yearly plan. Terms of Service: https://www.chunkapp.com/tos Privacy Policy: https://www.chunkapp.com/privacy