Liffer

Reference

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Your offline brain - a searchable knowledge base and a private, on-device AI assistant. No signal, no Wi‑Fi, no tracking. Ask anything, anywhere. Liffer is a reference library that lives on your phone. Download what you need once, then search, browse, and ask questions with no connection. There's no account to set up, no ads, and no tracking. EVERYTHING WORKS OFFLINE - Content packs are stored on your device, so they work in airplane mode, abroad, off-grid, or when the network is down - Fast full-text search across every pack you've installed - Semantic search that finds answers by meaning, not just matching words ON-DEVICE AI ASSISTANT (OPTIONAL) - Download a small AI model that runs on your phone - Ask questions in plain language and get answers based on your installed packs - It works with no connection, and nothing you ask is sent anywhere CONTENT PACKS - Medical Encyclopedia: first aid and health reference (free) - Wilderness Survival: shelter, water, fire, navigation (free) - Science, History, Geography, Astronomy, Mathematics and more with Liffer Pro LIFFER PRO One payment unlocks every content pack and unlimited AI questions. It's a single purchase, not a subscription, with no recurring fees. It restores on any device signed in to your Apple ID. YOUR DATA STAYS ON YOUR DEVICE Your reading history, bookmarks, and questions are kept on your phone. Liffer doesn't need an account and doesn't track you. Liffer gives you general reference information only. It is not a substitute for professional medical advice, diagnosis, or treatment. In an emergency, call your local emergency services.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

- Light and dark themes that follow your system appearance - Refreshed look with a new display typeface - Clearer on-device AI setup, with a helpful guide when the model isn't downloaded yet - Settings polish and several small fixes

Version 1.0.1

The developer, Vaidotas Sackus, 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, 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
    • Vaidotas Sackus
    Size
    • 210.5 MB
    Category
    • Reference
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 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+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Vaidotas Šačkus
  • Developer Website
  • Privacy Policy

    • More by Vaidotas Sackus