Liffer

Liffer is an offline reference app for when the network isn't there: travel, backcountry trips, field work and emergencies.

Download the packs you need once. After that everything works in airplane mode, in a national park or on a phone with no SIM.

WHAT'S INSIDE

• First aid: step-by-step cards for CPR, choking, severe bleeding, burns, anaphylaxis, stroke, unconsciousness and hypothermia, with a button that calls your local emergency number.
• Medical: 500+ Wikipedia articles on diseases, drugs, anatomy and emergency conditions.
• Wilderness Survival: 30 articles on shelter, water, fire, navigation, weather, wildlife and life-threatening situations (cold, heat, flood, fire, avalanche).
• Essential Phrases: travel and emergency phrases in Spanish, French, Arabic, Mandarin and Portuguese.
• Physics, Astronomy, Mathematics, Geography and World History, from Wikipedia.

BUILT FOR THE WORST MOMENT

• Works fully offline. No account, no signal needed.
• Search by keyword or by meaning, even when you don't know the exact words.
• First aid from Siri, Spotlight and Home Screen and Lock Screen widgets.
• First aid steps can be read aloud.
• Bookmarks and reading history stay on your phone.
• Clean, high-contrast design with large type, easy to read in a hurry.

OPTIONAL: ON-DEVICE AI ASSISTANT

Download an AI model once (0.5 to 2.7 GB; Liffer suggests the best one for your iPhone). Ask in your own words, by typing or by voice, and get answers from your packs even in airplane mode. Each answer shows the articles it used and can be read aloud. The model runs on your phone, so your questions never leave it.

FREE AND PRO

Free: first aid cards, the Medical and Survival packs and 5 AI questions a day.
Liffer Pro: every pack and unlimited AI questions. One payment, no subscription.

PRIVACY

• No accounts, no ads, no tracking.
• Bookmarks, history and everything you ask stay on your phone.
• Optional anonymous usage statistics and crash reports help fix problems. One switch in Settings turns them off.

NOT A SUBSTITUTE FOR PROFESSIONAL CARE

Liffer is general reference content, not medical advice. In an emergency, call your local emergency number whenever possible. The medical content has not been reviewed by a clinician, and the app says so.