GrainBook
AI feed for what you follow
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Subscribe to sources, set your interests, get a feed that actually learns what you care about.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Smarter Onboarding
Pick your interests first, then your sources — a clearer two-step setup with a progress bar.
New "Add" Tab + Global Search
The Search tab is now "Add" — one place to search, subscribe, and add content. Tap to open a global
search overlay from anywhere.
Redesigned Home Filters
A fresh filter bar on Home with bigger labels, a smooth gradient fade, and auto hide-on-scroll.
Unavailable sources now show a friendly toast.
Bear Theme by Default
A warmer look out of the box, with refined colors across Settings and Home.
Better Recommendations
Soft de-duplication keeps your feed fresh — fewer repeats, more variety on every refresh.
Source Improvements
Bilibili subscriptions are faster and more reliable. RSS rebuild now notifies you the moment it's ready.
Fixes & Polish
Smoother auth after account deletion, no more subtitle flicker, faster interest saving, Twitter Pro quota
in Plans, and many small visual touch-ups.
The developer, Yuan Long, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Financial Info
- Location
- Contact Info
- User Content
- Search History
- Usage Data
- Diagnostics
- Body
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yuan Long
- Size
- 144.4 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Infrequent
Cartoon or Fantasy Violence
Realistic Violence
Profanity or Crude Humor
Mature or Suggestive Themes
Horror/Fear Themes
Medical Treatment information
Alcohol, Tobacco, Drug Use or References
Sexual Content or Nudity
Contains
Unrestricted Web Access
User-Generated Content
Health or Wellness Topics
- In-App Purchases
Yes
- Grainbook Go (1-Month) $4.99
- Grainbook Go (12-Months) $44.99
- Copyright
- © 2025 Yuan Long. All rights reserved.
