Recall is an AI-driven knowledge base that can summarize and save any online content. It can summarize YouTube videos, articles, podcasts, PDFs, recipes, movie and TV show lists, and other web page content and automatically categorize and save the summaries to your personal knowledge base. Saved summaries will also automatically be linked to related content you've saved in the past, helping you find connections as you consume content and rediscovering past content when relevant topics arise. Recall also utilizes scientifically-backed techniques like spaced repetition and active recall to help you review and solidify the knowledge stored in your knowledge base.