Google's AI research tool, NotebookLM, is now available as an app for Android and iOS users, with a web version also available.NotebookLM helps users pull together, summarize, and study information from multiple sources like websites, PDFs, and YouTube videos.Users can create notebooks with different sources, including text, PDFs, MP3 files, YouTube links, Google Docs files, and websites.The app provides summaries and answers questions based on the imported sources, offering citations for transparency.Users can generate AI-hosted podcasts called Audio Overviews for each notebook, providing a conversational summary of the content.NotebookLM allows users to interact with the AI podcasts by asking questions or making points during audio playback.The web version of NotebookLM offers additional features like creating study guides, timelines, FAQ documents, and briefing documents.Google plans to introduce more features, including video overviews, to NotebookLM in the future.NotebookLM is available for free with optional paid subscription plans for higher usage limits.The app's user interface may initially seem complex, but it offers powerful tools for organizing and analyzing information.