Question 1

Does Lemmly really work offline?

Accepted Answer

Yes, Lemmly is 100% offline. The AI runs locally on your Mac Apple Silicon and on iPhone/iPad with private iCloud syncing.

Question 2

Which majors is it suitable for?

Accepted Answer

Lemmly is designed for STEM students: Engineering, Mathematics, Physics, Computer Science, Medicine, Chemistry. Perfect for hundreds of pages.

Question 3

What are the system requirements?

Accepted Answer

On Mac you need an Apple M1 chip or later with macOS 26 (Tahoe) or higher. On iPhone and iPad you need iOS or iPadOS 26.0, and on Apple Vision visionOS 26.0. The app itself is about 12 MB; the extra space is only for the AI model you pick, from ~3 to ~16 GB.

Question 4

Is Lemmly free?

Accepted Answer

Yes! Lemmly for macOS is free and downloadable directly from the App Store. There are no mandatory subscriptions or server costs.

Question 5

How does AI on PDFs work?

Accepted Answer

You load your PDFs, Lemmly indexes the content with local RAG (Retrieval-Augmented Generation) without uploading files.

Question 6

Are my data safe?

Accepted Answer

Absolutely. Everything stays on your devices. Syncing is done securely and encrypted via your personal iCloud (CloudKit) account.