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FeynmanLM vs Readwise Reader
Readwise is the de facto hub for syncing highlights — from Kindle, articles, tweets, and podcasts — and its Reader app is one of the best read-it-later apps available. FeynmanLM overlaps with Reader on gathering everything you read into one place, but the two products bet on different things: Readwise bets on resurfacing highlights, FeynmanLM bets on testing whether you actually understood the source.
At a glance
| FeynmanLM | Readwise (Full plan) | |
|---|---|---|
| Price | $29 one-time (launch price, regular $67), 7-day trial | $9.99/mo billed annually ($119.88/yr), or $12.99/mo monthly. No free tier after the 30-day trial |
| AI costs | Pay-as-you-go: free with your existing AI subscription (Claude, ChatGPT, Gemini, Grok), or your own API key at provider list price | Ghostreader AI included in subscription; no model choice, no bring-your-own-key |
| Platforms | Native macOS app (macOS 14+) | Web + iOS + Android; no native desktop app |
| Data storage | Local SQLite + files in your private iCloud container | Readwise's cloud, account-based |
| Podcasts | Follow shows from Apple Podcasts, full episode transcripts as sources | Podcast highlights only, via Snipd or Airr integration |
| Review method | Feynman-technique dialogue with an AI tutor that reads the full source | Daily Review: spaced resurfacing of highlights + self-graded flashcards (Mastery) |
| Model choice | Any MCP-compatible AI, or any API provider in-app | GPT-based Ghostreader only |
| Export | Your files stay in your iCloud Drive; SQLite database you can open | Excellent: continuous export to Obsidian, Notion, Roam; CSV/markdown; API |
Pricing verified July 2026 — check readwise.io/pricing for current numbers.
Pricing: subscription vs one-time
Readwise costs $119.88 every year (annual Full plan) and there is no free tier — when you stop paying, Daily Review stops. Over three years that's ~$360.
FeynmanLM is a $29 one-time purchase (launch price). The AI that powers review is pay-as-you-go: if you already pay for Claude, ChatGPT, Gemini, or Grok, connecting FeynmanLM to it via MCP costs nothing extra. If you prefer the in-app Chat, you bring an API key and pay the provider's list price for exactly the tokens you use — the app shows you the cost of every conversation to the cent.
Where Readwise is better
- Highlight aggregation. If your workflow centers on highlights — Kindle, Instapaper, physical books via photo OCR — nothing matches Readwise's ingestion breadth.
- Mobile. Readwise and Reader run on iOS and Android. FeynmanLM is Mac-only today.
- Export integrations. Continuous automated sync into Obsidian, Notion, Roam, and Evernote is best-in-class.
- RSS and newsletters. Reader doubles as a feed reader and newsletter inbox; FeynmanLM doesn't.
- Maturity. Readwise has been refining this loop for years; FeynmanLM is a young indie product.
Where FeynmanLM is better
- Testing understanding, not re-exposure. Readwise's Daily Review shows you a highlight and asks if you remember it. FeynmanLM runs a Feynman-technique session: you explain the concept back, and an AI tutor with the full source text probes your gaps and follows up. Recognition isn't understanding — see Why Quizzing?.
- Your data stays yours. Your library is a local SQLite database and files in your private iCloud container, synced through your Apple account. Readwise is a cloud service: stop paying and you're down to exports.
- Full podcast episodes, not snips. FeynmanLM follows your Apple Podcasts shows and ingests full episode transcripts you can read, listen to, and be quizzed on. Readwise only gets podcast content if you also use Snipd or Airr, and only the moments you snipped.
- Model freedom. Use whichever AI you already pay for, switch providers anytime, or run reviews from Claude, ChatGPT, Gemini, or Grok directly via MCP. Ghostreader is take-it-or-leave-it.
- No recurring fee. One purchase, no subscription meter running while your reading backlog grows.
- Native Mac app. Readwise on desktop is a browser tab.
Which should you choose?
Choose Readwise if you live in highlights across many devices, want them piped into your notes app, and are happy with passive resurfacing — especially if you need Android or Windows.
Choose FeynmanLM if you're on a Mac, want your library stored in your own iCloud rather than a subscription cloud, and want to close the loop from "I read it" to "I can explain it" — with the AI you already use.
They also combine well: some people keep Readwise for highlight capture and use FeynmanLM as the learning loop on the sources that matter.