Intelligent Reading Companion

Turn any book into a
test of understanding

Calten uses AI to convert any book or PDF into an interactive test, helping you retain more through active recall.

  1. 1Upload a book
  2. 2AI generates questions
  3. 3Test your understanding

Drop your PDF

or click to browse

Supports files up to 500 MB

✓Unlimited usage✓No subscriptions✓No hidden charges
Learn how it works →
📚—tests completed
❓—questions answered
📖—books in library