Liffer

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.