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.

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What's new: • Polished bilingual (English/Chinese) support across the app • New side-by-side pricing comparison on the upgrade page • Subscription sources now show Gmail, Spotify, and arXiv icons • Home digest now supports DeepL translation • Fixed Twitter paywall handling • Localized RSS setup, Telegram login, Echo360, and OAuth flows

Version 1.0.1

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

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Yuan Long
Size
  • 143.3 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.
Languages
  • English
Age Rating
16+
  • 16+
  • Learn More
  • 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) $11.99
  • Grainbook Go (12-Months) $107.99
  • Learn More
Copyright
  • © 2025 Yuan Long. All rights reserved.
  • Privacy Policy
  • License Agreement

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