Offline reference for iPhone
Your knowledge base. Always offline.
Medical, survival, science and history reference, plus an AI assistant that runs on your phone. Download it once and it keeps working with no signal at all.
Free on the App Store. Pro is a one-time purchase, not a subscription.
At a glance
- Internet
- Only to download
- AI assistant
- Runs on the phone
- Account
- None
- Ads
- None
- Price
- Free, Pro €19.99 once
Why Liffer
Made for no signal
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Works fully offline
Everything lives on your phone. Airplane mode, a cabin with no coverage, a dead zone on the road: it still opens and searches.
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An AI assistant on the phone
Ask in plain language and get answers from your installed packs. The model runs locally, so your questions never leave the device.
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Real reference content
Thousands of articles across medicine, survival, science, history, geography and more.
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Search that gets the meaning
Instant keyword search, plus semantic search that finds the right article when you don't know the exact word.
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Stays on your phone
There's no account to make. What you read and what you ask stays on the device, and we don't run ads.
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Pay once
Pro unlocks every pack and unlimited AI questions for a single payment. It's yours for good.
How it works
Set up once, use anywhere
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1
Download the packs
Install Liffer and pick the packs you want while you still have a connection. Each one is roughly 5 to 20 MB.
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2
Add the AI model, if you want it
The assistant needs a compact language model of about 1 GB. It downloads once, Wi-Fi recommended.
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3
Go off the grid
Search, read, bookmark and ask questions in airplane mode, in the backcountry, or anywhere the network isn't.
What's inside
The packs
Two packs are free. Pro unlocks the rest, and every pack we add later.
- 01Medical EncyclopediaFree
- 02Wilderness SurvivalFree
- 03SciencePro
- 04HistoryPro
- 05GeographyPro
- 06AstronomyPro
- 07MathematicsPro
- 08Future packsPro
Not medical advice
Liffer is general reference material adapted from established open encyclopedic sources. In an emergency, call your local emergency number whenever you can.
Pricing
Free to start, Pro for good
Free
€0
- Medical and Survival packs
- Full offline search
- AI assistant, 5 questions a day
Liffer Pro
Pro€19.99one-time
- Every content pack
- Unlimited AI questions
- All future packs included
Secure checkout with Stripe. After paying, open the app to unlock. You can also buy Pro inside the app.