Eureka Buddy supports three flexible ways to run AI: On-device AI (Apple Intelligence on supported devices, plus downloadable local MLX models that run offline on your device), your own LM Studio server over your local network or Tailscale, or Cloud AI (Google Gemini or Anthropic Claude) using your own API key.
If you choose to use an optional cloud provider, you can generate your own API key directly from the provider:
Your API key is stored only in the iOS Keychain on your device and is never sent to the developer.
Start the local server in LM Studio on your Mac or PC, then enter your computer's LAN IP address or Tailscale IP address and port (for example, http://192.168.1.50:1234) in Eureka Buddy's AI settings. When iOS/iPadOS prompts you, allow Local Network access so the app can reach your computer.
No, unless you explicitly turn on and consent to a cloud AI provider (Google Gemini or Anthropic Claude). All PDFs, annotations, AI margin notes, excerpts, drawings, chat history, and knowledge graphs are stored locally on your device. Read our full Privacy Policy for complete details.
You can withdraw Cloud AI consent or clear your saved API keys anytime in Settings › About & Privacy. To delete your documents and generated indexes, delete the book inside the app or uninstall Eureka Buddy from your device.
