ExtraBrain

Productivity

Free · Designed for iPad. Not verified for macOS.

ExtraBrain is your on-device second brain — capture, import, and recall personal knowledge without uploading your content. ExtraBrain is your on-device second brain — capture, import, and recall personal knowledge without uploading your content. **Remember** • Chat with an on-device assistant, then summarize & save key points • Import TXT, Markdown, PDF, and DOCX into a local memory library • Browse and filter memories anytime **Recall** • Ask in natural language — vector search retrieves local hits first • On-device RAG streams an answer from your own memories • Search and inference stay on this device and never upload content **Private by design** • Memories, embeddings, and chat stay on your iPhone by default • Sign in with Apple only for trial / Pro entitlement • Delete your account anytime in Settings **Pro** • Free local trial for recall search • ExtraBrain Pro Monthly unlocks unlimited recall after the trial • Payment charged to your Apple ID; cancel anytime in Apple ID → Subscriptions Generated answers can be wrong — verify important facts.

Ratings & Reviews

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What's new in 1.1.0 • Smaller App Store download — the on-device AI model (~1.1 GB) is fetched from Hugging Face the first time you use chat or recall, then stays on your iPhone for offline use • Clear download progress, plus Settings controls to download or remove the model • Smoother on-device chat and memory recall once the model is ready Privacy tip: after the one-time download, inference stays on device by default.

Version 1.1.0

The developer, Yanbo Gao, 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 Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, 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
    Yanbo Gao
    Size
    258.8 MB
    Category
    Productivity
    Compatibility
    Requires iOS 16.4 or later.
    • iPhone
      Requires iOS 16.4 or later.
    • iPad
      Requires iPadOS 16.4 or later.
    • Mac
      Requires macOS 13.3 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and Simplified Chinese
    Age Rating
    16+
    Copyright
    © 2026 ExtraBrain. All rights reserved.
  • Privacy Policy

    • More by Yanbo Gao