Turn YouTube into your second brain.
Hover for the verdict. Save the lesson. Quiz yourself tomorrow. Remember forever.
- ✓Vibe Check verdicts
- ✓AI Smart Notes
- ✓Knowledge Graph
- ✓Spaced-rep quizzes
- ✓Travel Pro & Finance Audit
- ✓Export to Anki / Obsidian
- ›Traces the historical conflict that birthed complex numbers
- ›Visualizes rotation in the complex plane intuitively
- ›Ends with Schrödinger's equation as the payoff
The 5-layer learning system
Every YouTube video has a lifecycle. Clarion handles all of it.
Judge what to watch, capture what matters, organize what you save, recall what you learned, and extend it into wherever you already work.
🎯Layer 1 · Judge
Vibe Check — Instant verdict on every video
Hover any thumbnail. In 3 seconds get a 0–100 credibility score, ✅/👀/⏭ recommendation, and 3 key takeaways. Finance videos get an extra risk audit that flags missing disclaimers and unrealistic guarantees.
- Hover popup with score + verdict + 3 takeaways
- Finance Audit risk flags
- Aging-info warnings
- ✗ No disclaimer mentioned
- ✗ Guarantees "12% returns"
- ✓ Affiliate links disclosed
📚Layer 2 · Capture
Smart Notes — AI study guides for any video
Click once. Get a polymodal guide with timestamped steps, KaTeX-rendered formulas, syntax-highlighted code, prerequisite glossaries, derivation chains, and pro-tip callouts.
- Timestamps that jump back into the video
- Formulas, code, and key insights side-by-side
- Output in 50+ languages with RTL support
🧠Layer 3 · Organize
Vault — Your YouTube knowledge, organized
Cloud-synced library with 15 smart folders, fuzzy full-text search, and bulk tag management. Plus a force-directed Knowledge Graph that shows how every note connects.
- Smart folders auto-tag every note
- Knowledge Graph with zoom / pan / focus mode
- Full-text search across thousands of notes
🔁Layer 4 · Recall
Active Recall — Quiz, repeat, remember 4× longer
AI-generated quizzes (MCQ + fill-in-blank with explanations) from any note or folder. SM-2 spaced repetition surfaces the right card on the right day. Ask Vault chats with your library and cites its sources.
- Quiz Me on any note or folder
- Spaced repetition + daily reminder
- Ask Vault chat with inline citations
🌍Layer 5 · Extend
Travel Pro · Finance Audit · Export anywhere
Travel videos auto-extract visa info (localized to your country), expense breakdowns (auto-converted to your currency via live forex), and itineraries with Google Maps + Booking deep-links. Export anything to Anki, Obsidian, or Notion.
- Travel Pro: visa + itinerary + budget, localized
- Finance Audit: risk flags on investment videos
- Sync to Anki, Obsidian, Notion (Premium)
How it works
From passive viewer to active learner — in four steps.
- 01Hover
A 3-second verdict, score, and 3 takeaways appear before you click. Skip the duds.
- 02Save
One click turns any video into a structured AI study guide in your Vault.
- 03Quiz
Spaced-rep flashcards surface the right note on the right day — automatically.
- 04Remember
Streaks, knowledge graphs, and chat-with-your-vault lock it in for the long term.
Polyglot
Smart Notes in 50+ languages
Pick your language once. Every verdict, summary, formula caption, and flashcard renders in your tongue — with proper right-to-left layout for Arabic, Hebrew, Persian, and Urdu.
- EnglishWelcome
- EspañolBienvenido
- FrançaisBienvenue
- DeutschWillkommen
- PortuguêsBem-vindo
- हिन्दीस्वागत है
- العربيةأهلاً
- עבריתברוך הבא
- 中文欢迎
- 日本語ようこそ
- 한국어환영합니다
- فارسیخوش آمدید
Pricing
Pick a plan. Cancel anytime.
Free is genuinely free. Pro pays for itself in saved hours.
Try every layer of Clarion. No card required.
- ✓90 vibe checks / month
- ✓2 hours of Smart Notes / mo
- ✓5 vault saves
- ✓1 quiz preview / mo
For learners who watch — and remember — every day.
- ✓150 vibe checks
- ✓200 hours of Smart Notes
- ✓Unlimited vault + Quiz Me
- ✓50 Ask Vault messages
- ✓Daily review reminders
Power users who export to Anki, Obsidian, and Notion.
- ✓500 vibe checks
- ✓600 hours of Smart Notes
- ✓Everything in Pro
- ✓500 Ask Vault messages
- ✓Sync to Anki / Obsidian / Notion
Stop watching the wrong videos. Start remembering the right ones.
Free forever. Works on any YouTube page. Sign in only when you're ready to save.