GrainBook

GrainBook turns the sources you already follow — YouTube, podcasts, RSS feeds,
newsletters, Reddit, and more — into a single, searchable knowledge feed. Every video,
episode, and article gets a clear AI summary, so you can stay informed without spending
hours scrolling.

MULTI-SOURCE INTEGRATION
Bring all your subscriptions into one place. GrainBook fetches new content from YouTube
channels, podcasts, RSS feeds, email newsletters, Twitter/X, Reddit threads, and saved
web pages — and keeps everything in sync automatically.

SMART AI SUMMARIES
Concise, faithful summaries for everything you save. Read the gist in 30 seconds; open
the full source when something catches your attention. Designed for the way you actually
want to consume long-form content.

ASK YOUR LIBRARY
Talk to your saved content. Ask GrainBook anything — "show me podcasts about RAG", "what
did I read about React Native last week" — and get answers grounded in your own sources,
with citations you can tap to open the original.

SAVE AND REVIEW
Build a personal knowledge library. Star important insights, group them into collections,
and come back to reflect, review, and connect ideas over time.