Lamp Sage Coming soon

For iPhone · Works off the grid

Your survival library. Off the grid.

First aid, repair and survival guides and a whole encyclopedia, on your iPhone. Search them as fast as you type, or ask a question in your own words and get an answer with sources. No signal needed.

Coming soon to the App Store See what it does

Free for 3 days, then €9.99 a year or €24.99 once. No account, no ads.

Works offline

After setup it needs no connection, in Airplane Mode too.

Answers you can check

Every claim links to the article it came from.

Private by design

Nothing you read, ask or photograph leaves your iPhone.

Features

A library that answers back.

Lamp Sage search results for “water puri”, listing matching articles from several libraries.

Search

Search everything, instantly.

Download free libraries inside the app, then type a few letters and Lamp Sage looks through all of them at once: encyclopedias, medical references, repair guides, survival manuals. Results change with every letter, and articles open in a clean, modern reader with bookmarks, history and adjustable text.

A Lamp Sage chat answering “How do I purify water without electricity?” in four numbered steps, each with a source link.

Ask AI

Ask in your own words.

Ask a question the way you would ask a person. The AI on your iPhone finds the right articles, reads them and answers in plain language, with numbered links to every source so you can check it yourself. Ask follow-ups like a chat; your conversations stay on your device.

A photo of a rope knot in a Lamp Sage chat, with the AI’s description, steps for tying a bowline and two sources.

Photos

Ask about a photo.

Take a photo and ask about it. The AI describes what it sees, then looks it up in your libraries. A photo can't confirm what something is, so Lamp Sage always shows the sources to compare.

The AI model screen in Lamp Sage, listing Apple Intelligence and downloadable open models.

Your AI

Your choice of AI, all on-device.

Use Apple Intelligence, or download an open model once and run it entirely on your iPhone. Bigger models give better answers; smaller ones are faster and easier on the battery.

  • Apple Intelligence
  • Qwen
  • Gemma
  • Phi

Built for no signal

When the grid goes down, your library doesn't.

  • Free libraries, built in. Quick Setup gets medical, water, food and survival guides in one tap, before you lose signal. Downloads keep going with the screen off.
  • Reads straight from an external SSD. Hundreds of gigabytes of libraries, and nothing is copied to your iPhone.
  • True-black dark mode. On an OLED screen, black pixels are off.
  • Battery Saver. Hides pictures, dims the screen and reduces AI work when power is short.
  • Airplane Mode friendly. Search, reading and AI answers all work with every radio off.
The Lamp Sage home screen in true-black dark mode, showing five libraries and recently read articles.

No account. No tracking. No cloud.

Lamp Sage collects no data. Your libraries, questions, chats and photos never leave your iPhone. Read the privacy policy.

How it works

Three steps, then you're ready.

  1. 1

    Get your libraries

    Tap Quick Setup for free survival libraries in one tap: a medical encyclopedia, medical guides, safe water, food, knots and more. They download in the background, screen off is fine. Or add ZIM files you already have, from your iPhone or an external drive.

  2. 2

    Search or ask

    Look something up by title, or ask the AI a full question. Both work across every library you've added.

  3. 3

    Check the sources

    Open the articles behind each answer with one tap, and bookmark what you want to keep close.

Lamp Sage itself includes no content. The free libraries belong to their publishers.

At a glance

Lamp Sage in one minute.

Lamp Sage is an iPhone app that turns offline library files (first-aid and medical references, repair and survival guides, encyclopedias) into a searchable survival library, with on-device AI that answers questions from those files and cites its sources. It works without internet after setup, needs no account and collects no data.

What it is
An offline survival library and AI assistant for iPhone.
Works offline
Yes. After setup, search, reading and AI answers all work without internet, including in Airplane Mode.
Libraries
Quick Setup downloads free survival libraries in one tap (medical, safe water, food, knots, after a disaster and more), in the background, also with the screen off. Browse more free libraries in the app, or add your own files in the open ZIM format from iPhone storage or an external SSD. Lamp Sage itself includes no content.
Search
Instant title search across every library at once, plus a word index for libraries up to 1.5 million titles.
AI answers
Ask in your own words; the on-device AI reads the matching articles and answers in plain language with numbered links to its sources.
AI models
Apple Intelligence, or open models downloaded once and run on the iPhone: Qwen 3.5 (4B, 2B), Gemma 4 E2B and Phi-4 mini.
Photos
Ask about a photo with Apple Intelligence where the iPhone supports it, or with Qwen or Gemma after adding photo support in the app; the AI describes it and looks it up in your libraries.
Privacy
No account, no tracking, no ads, no analytics. Libraries, questions, chats and photos never leave the iPhone.
Battery
True-black dark mode and a Battery Saver that hides pictures, dims the screen and reduces AI work.
Requirements
iPhone with iOS 26 or later. Apple Intelligence needs an iPhone that supports it (iPhone 15 Pro or newer); open models are downloaded inside the app.
Price
3-day free trial, then €9.99 a year, or €24.99 once for lifetime access. Cancel any time in your Apple Account.
Safety
Information and AI answers can be wrong. Lamp Sage is not medical, safety or professional advice; check the sources.

Questions

Good to know.

Who is it for?

Anyone who spends time without signal or wants to be ready when it's gone: hikers, campers, sailors, travellers, people in remote places, and anyone preparing for power cuts and emergencies. It also makes a very good offline encyclopedia for everyday reading.

Is it like ChatGPT?

The idea is similar, with two differences. It works without internet, and it answers from your own libraries and shows where each answer came from. The AI on a phone is smaller than the ones in the cloud and can be wrong, which is why the sources are always one tap away.

Where do the libraries come from?

Inside the app. Tap Quick Setup for a ready-made set of free survival libraries in one tap (medical, safe water, food, knots, after a disaster and more), or browse all free libraries and pick your own. They download in the background (screen off is fine) and appear when they're done. You can also add ZIM files you already have, with the Files app or from an external drive. Very large libraries are easier to download on a computer, straight onto your drive.

Can it open ZIM files, like offline Wikipedia?

Yes. Lamp Sage reads standard ZIM files, the open format used for offline copies of Wikipedia, medical references, repair guides and more. Download free ones inside the app, or add files you already have from your iPhone or an external drive. Lamp Sage is not affiliated with the Wikimedia Foundation.

Which AI does it use?

Your choice, and all of it runs on your iPhone. Use Apple Intelligence, or download an open model once inside the app: Qwen 3.5 (4B or 2B), Gemma 4 E2B or Phi-4 mini. After the download it works offline, in Airplane Mode too.

Does it really work with no internet?

Yes, after setup. You need a connection once to download your libraries and, if you want one, an open AI model. Do it before you head out. After that, searching, reading and asking all work offline.

Which iPhone do I need?

Lamp Sage needs iOS 26 or later. Ask AI uses Apple Intelligence where your iPhone supports it (iPhone 15 Pro and later), or an open model that you download inside the app.

How much space do libraries take?

It depends on the library: from a few megabytes for a small guide to more than a hundred gigabytes for a full encyclopedia with pictures. Large libraries can stay on an external SSD; Lamp Sage reads them from there.

Can I rely on it for medical or safety decisions?

No. Lamp Sage shows information from the libraries you add, and AI answers that can be wrong. It is not medical, safety or professional advice. Always check the sources and get professional help when you can.

What does it cost?

Free for 3 days. Then €9.99 a year, or €24.99 once for lifetime access. Buy and cancel through your Apple Account. No ads, no account, no data collection.

Keep a light on.

Lamp Sage for iPhone. Your survival library, ready when the signal isn't.

Coming soon to the App Store