| What it does | AI-powered study tool that turns documents into instant learning materials
| Stop forgetting what you read.
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| Stage | Not given
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| Founded | Not given
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| Based in | US
| HR
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| Pricing model | Freemium
| Freemium
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| Pricing | Free plan includes limited uploads and AI chats. Pro plan costs $15/month with unlimited uploads, unlimited AI chats, and advanced features.
| First book free. Kern Plus subscription (monthly or yearly) unlocks unlimited books, or single-book one-time purchases available.
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| Key features | - AI Chat: Ask questions about uploaded documents with answers grounded in source materials
- AI Summaries: Generate instant summaries from PDFs and documents
- Mind Maps: Create visual representations of content structure
- AI Flashcards: Auto-generate flashcard sets for studying
- AI Quizzes: Generate practice quizzes from study materials
- Video Explanations: Create video tutorials from documents
- FlowNote: Automatic note system that organizes learning into structured notes
- Multi-language support: Ask questions in any language and receive responses in the same language
- Study Modes: Socratic Mode and Feynman Mode for different learning approaches
- Document upload support: Handle PDFs, slides, recordings, and text files up to 300 MB
| - Flashcards generated from book titles without highlights or uploads
- Spaced repetition across all books in one interleaved feed
- Four card types: quick check, fill the blank, explain simply, myth buster
- Home Screen widget for answering cards without opening the app
- Wall widget showing how fresh each book is
- Lock Screen widgets showing which book is fading next
- Reminders at your chosen quiet time, only on days you haven't reviewed
- No account required, reviews work fully offline
- Works with paper books, Kindle, audiobooks and library copies
- Cards written in Kern's own words, not excerpts from books
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| What makes it different | - Source-grounded AI that answers only from uploaded materials, not general knowledge
- Hallucination-resistant tutor trained only on user study materials
- All-in-one toolkit converts single document into multiple study formats instantly
- FlowNote automatically captures and organizes learning process in real-time
- Used by top learners from 30+ universities worldwide
| - No account, sign-up or email capture required
- Works for books without highlights, uploads or notes
- Covers audiobooks and library copies that other retention tools cannot handle
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 9 ● no change since last check | 14 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 9 | 3 |
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| Citation Flow (Majestic) | 21 | 21 |
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| Referring domains (Majestic) | 135 | 23 |
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Cuflow
Kern