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iCloud Storage & Privacy
FeynmanLM stores your knowledge base in your personal iCloud container. Your sources and knowledge base sync automatically via iCloud; FeynmanLM servers do not store that library.
How it works
All data is written to your private iCloud container — a dedicated, app-specific storage area within your iCloud account. Apple handles sync and encryption:
- At rest: encrypted on Apple's servers with keys derived from your iCloud account.
- In transit: encrypted over TLS between your devices and iCloud.
- On device: protected by your device passcode and the Secure Enclave.
FeynmanLM servers do not store your source library.
What's stored in iCloud
| Data | Description |
|---|---|
| Knowledge database | Sources and their content |
| Source PDFs | Papers, books, and articles you've added |
| Artifacts | Generated explorable explanations and Feynman session records |
Data is stored as flat files and a SQLite database, so sync is fast and reliable.
What FeynmanLM servers do not store
- Your source content
- Your book or article PDFs
- Your podcast transcripts
- Your Feynman session history
There are two important exceptions for traffic you explicitly enable:
- AI providers: if you configure an API key or use an external AI assistant, the selected source content or prompts you send go to that provider.
- Hosted MCP relay: if you choose the FeynmanLM hosted Cloudflare relay, MCP requests and responses pass through FeynmanLM-operated Cloudflare infrastructure before reaching your Mac. The relay is not designed to store request or response bodies, but it is a trusted relay and is not end-to-end private from FeynmanLM infrastructure.
If you want MCP traffic to avoid FeynmanLM infrastructure, use Tailscale or another tunnel you control.
Deleting your data
Since everything is in your iCloud account, you have full control:
- Delete the app: removes local data from that device. iCloud data remains until you remove it.
- Delete from iCloud: go to Settings > [Your Name] > iCloud > Manage Storage > FeynmanLM and delete the data.
No need to contact FeynmanLM or request data deletion. You own it all.