Built by researchers, for researchers

All the content you consume,
in one place.

FeynmanLM is a knowledge base for the papers, podcasts, books, videos, and articles you learn from. It lives in your iCloud — and plugs straight into Claude, ChatGPT, or any AI chat app.

Download for Mac See how it works

Free to download · pay only for what you use · macOS 14+

FeynmanLM Studio on macOS: source library, reader, and Schedule
01
Capture anythingPapers, podcasts, books, video
02
Find it againSearch every source in full
03
Learn it for goodPlan, quiz, review, listen

If you learn from it, it belongs here.

arXiv papers Apple Podcasts Books (PDF & EPUB) YouTube videos Articles & blogs PubMed & DOIs Meeting transcripts X threads Google Docs Courses & lectures Newsletters Slack threads arXiv papers Apple Podcasts Books (PDF & EPUB) YouTube videos Articles & blogs PubMed & DOIs Meeting transcripts X threads Google Docs Courses & lectures Newsletters Slack threads

“I vaguely remember a paper from two years ago…”

Watch the whole loop play out — capture, find, plan, quiz, listen — right here in your browser. Click any step to jump to it, or hit pause to poke around yourself.

Add
  • Fetching the PDF
  • Extracting title, authors & abstract
  • Indexing the full text for search
✓ Added Multi-omic rejuvenation by partial reprogramming

Drop a link, DOI, PDF, podcast, or video — FeynmanLM fetches it, reads it, and files it in your iCloud.

⌘F

Semantic search over the full text of everything you've ever added — not just titles.

Your AI assistant, quizzing you on your own sources via MCP.
0 of 5 reviewed this week
Unscheduled

Click an unscheduled source to slot it into your week. Click a scheduled one to mark it reviewed.

The Hallmarks of Aging — Part II Paper · 42 min listen · 0:00

Turn any paper, article, or thread into audio. Queue it overnight, listen on your commute.

MCP built in

Your knowledge base, inside your chat app.

You already think alongside an AI assistant. FeynmanLM connects your whole library to it over MCP — so Claude or ChatGPT can search your sources, pull the full text, quiz you Feynman-style, and save the review back into your library.

No copy-pasting PDFs into chat windows. No re-explaining what you're studying. Your assistant simply knows what you know.

What your assistant sees
▸ search_sources_semantic("partial reprogramming epigenetic clock")
3 matches · top: “Multi-omic rejuvenation by partial reprogramming” (2024)
▸ get_source_content(source_id)
Full paper text · 41,200 characters
▸ start_review_session(source_ids)
Feynman review started · transcript will be saved back
▸ end_review_session(transcript)
Review linked · schedule progress updated ✓
Why FeynmanLM is different

Built by researchers, for researchers.

FeynmanLM comes out of a working research habit, not a productivity trend. It optimizes for one thing: understanding that lasts.

01

Not another note-taking app

There are plenty of second brains to garden. FeynmanLM tracks the sources themselves — you bring the content, the AI brings the quizzing.

02

No flashcard graveyards

Instead of stale decks, your AI generates fresh Feynman-style questions from the source every time. Retrieval practice, without the maintenance.

03

Real papers, first class

Import from arXiv, PubMed, or any DOI. PDFs are fetched, metadata extracted, duplicates caught — the way a reference manager should behave.

04

Quizzing over highlighting

The research is unambiguous: testing yourself beats re-reading. Every review session probes what you actually understood, then saves the transcript.

05

Your files, no lock-in

Everything is plain files and SQLite in your own iCloud Drive. No proprietary cloud, no export hostage situation, nothing on our servers.

06

Works with the AI you already use

Bring your Claude or ChatGPT subscription over MCP, or use built-in pay-as-you-go AI. Either way, no new monthly fee.

Storage

It just lives in your iCloud.

Your library is stored in your own iCloud Drive and synced by Apple — so it's on every Mac you own, backed up without thinking about it, and readable even if FeynmanLM disappeared tomorrow. We never see your data.

  • Synced across your Apple devices by CloudKit
  • Works offline — it's just files on disk
  • Private by design: no accounts, no server-side library
Pricing

No subscription. Ever.

The app is free to download. Nothing to unlock, nothing to convert. You pay only for the AI you actually use — two ways, and you can mix them.

Built-in AI

Chat in the app

API rates+ 15%

Pick any model — pay its own list price plus 15%

  • Every source type, unlimited library
  • Choose your model — a cheap one stays cheap
  • Billed on the exact cost, never an estimate
  • Top up when you run out. That's it.
MCP

Bring your own AI

1¢ per tool call

Use the Claude or ChatGPT plan you already pay for

  • Your whole library, inside your chat app
  • Your subscription covers the thinking — we bill only for reading and writing your library
  • A daily cap keeps a chatty assistant from running up a bill

Either way, FeynmanLM spends a little on background work that keeps the app running — tidying transcripts, pulling paper metadata, building search indexes. It’s billed at the same API rates + 15%, itemised per task, and you choose the model for each.

FeynmanLM

Start remembering what you read.

Free to download. Pay only for what you use — your library stays in your iCloud either way.

Download for Mac