Your knowledge base.
Always offline.
Medical, survival, science, and history reference - plus an on-device AI assistant. Download once, keep it forever. No signal required.
Free to download. Pro unlock is a one-time purchase - no subscription.
Why Liffer
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cloud_off
Works fully offline
Everything is stored on your device. Airplane mode, off-grid, no signal - it just works.
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smart_toy
On-device AI assistant
Ask questions in plain language. The model runs on your phone - nothing leaves your device.
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library_books
Real reference content
Medical, survival, science, history, geography and more - thousands of articles.
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manage_search
Search by meaning
Instant keyword search plus semantic search that understands what you mean.
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verified_user
Private by design
No account, no ads, no tracking. Your reading and questions stay on your phone.
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all_inclusive
One-time purchase
Unlock every pack and unlimited AI once. Yours forever - no subscription.
Free
- check Medical & Survival packs
- check Full offline search
- check AI - 5 questions a day
Liffer Pro
- check Every content pack
- check Unlimited AI questions
- check All future packs included
Secure checkout via Stripe. After paying, open the app to unlock.