Cephadex

Cephadex is a web-based AI study platform for students, teachers, and content creators that turns existing learning content into personalized study materials.

Key capabilities include:

• Import-to-study generation from PDFs, PowerPoints, documents, audio files, web pages, and YouTube videos, creating flashcards, decks, worksheets, and quizzes.
• Interactive practice and assessment, including auto-graded quizzes, plus spaced repetition and educational games to support long-term retention.
• AI tutor bot for question answering while studying.
• Sharing, assigning, and collaboration tools for educators and groups, plus progress tracking in a community setting.

Pricing: Free.

Notable for combining multi-format content ingestion with spaced repetition, an AI tutor, and classroom-friendly assignment and auto-grading features in a single web app, reducing the need to juggle separate flashcard, quiz, and tutoring tools.