GRAINBOOK 2.0 · NOW LIVE
An ocean of noise.
One grain of knowledge.
Every video, podcast and newsletter you follow — distilled by AI into a three-minute read.
- ACTIVE READERS
- 3,000+ACTIVE READERS
- SOURCE TYPES
- 8SOURCE TYPES
- PER 1-HOUR PODCAST
- 3 minPER 1-HOUR PODCAST
YouTube✳Podcasts✳bilibili✳X / Twitter✳Reddit✳RSS✳Newsletters✳Ebooks · EPUB / PDF✳
Reads everything, like your own editor
FEATURES01
One timeline
YouTube, podcasts, bilibili, X, Reddit, RSS, newsletters, ebooks — everything you follow, in a single feed.
8 source typesAuto-updates
02
3-level AI summaries
Quick take, deep summary, full transcript — go exactly as deep as you want and miss nothing.
Quick takeDeep diveTranscript
03
Save & revisit
Favorites, history and tags turn scattered fragments into your personal knowledge base.
FavoritesHistory
One hub. Eight orbits.
THE ORBITEverything you follow, revolving around a single inbox.
YouTube
X
Podcasts
RSS
bilibili
Reddit
Newsletters
Ebooks
A look inside
SCREENS
Three steps
HOW IT WORKS
01
Subscribe
Paste a link or search — follow anything in seconds.
02
AI reads it all
New releases are fetched, transcribed and distilled automatically.
03
Read what matters
Skim, save and dive deeper in one clean feed.
What 3,000+ readers say
VOICESRated 5 out of 5
“The AI summaries are scarily accurate. An hour-long podcast takes me minutes now — it changed my daily routine.”
Rated 5 out of 5
“GrainBook pulls the gems out of every newsletter I subscribe to — I never dig through my inbox anymore.”
Rated 5 out of 5
“Every learning source finally lives in one place. My knowledge base has never been this organized.”
Ready to learn smarter?
Free to start · 100 credits monthly · Upgrade to Pro anytime
Download GrainBook