Frequently Asked Questions

VytalLink connects your fitness tracker and health apps to AI assistants like ChatGPT and Claude. You can ask questions about your sleep, workouts, steps, heart rate, and get clear answers.

You chat in ChatGPT on the web or in Claude Desktop on your computer. VytalLink doesn't have its own chat - it just connects your data to your AI assistant.

Not yet. ChatGPT on mobile doesn't work because the VytalLink app needs to stay open to share your data while you chat.

Yes. Keep the VytalLink app open while you chat so it can share your data with your AI assistant. Close the app and your AI can't get new data.

• Tap “Get Word + PIN” in the app to generate temporary credentials for your current session.
• When ChatGPT or your MCP client asks, paste the Word and PIN to authenticate the bridge.
• These credentials expire; generate new ones anytime.

No. Your phone is the source of truth. The relay is stateless and does not persist health data. Only the specific fields you approve per connection are streamed to your chosen AI provider.

You choose who to share your data with during each session. Once shared, the data is subject to the recipient’s policies:

• ChatGPT sessions are subject to OpenAI’s policies. Note: Our GPT integration is configured to not use your data for training.
• Claude Desktop sessions are subject to Anthropic’s policies.
• For MCP clients (Cursor, VS Code, etc.), data flows to the provider behind that client.

Review the provider’s terms before sharing. VytalLink does not sell or repurpose your health data.

• iOS: Apple Health (Apple Watch and many third‑party wearables that sync to Health).
• Android: Health Connect (support varies by device/app; we’re expanding coverage).

If your wearable syncs to your phone’s health platform, VytalLink can make that data conversational.

No. The fastest path is ChatGPT (no desktop setup). MCP is available for desktop workflows and power users.

• “Analyze my sleep last month vs. the previous one. Any recommendations?”
• “How did deep sleep change on strength days vs. cardio?”
• “Chart my heart rate over the last month and highlight trends.”
• “Are my steps up this month, and how did resting HR respond?”

AI answers depend on the model and your prompts. Try concrete time ranges, comparisons, or goals. We recommend verifying any critical insights and consulting professionals for medical decisions.

Stop the connection in the mobile app or simply close the app to pause the bridge. Since credentials expire and the relay is stateless, access ends when the session does. You can generate new credentials at any time.

No. VytalLink is completely anonymous and does not store any user data. You can use the app without creating an account.

MCP stands for Model Context Protocol. It’s a standard that allows desktop clients like Claude Desktop, Cursor, or VS Code to interact with your health data securely and efficiently. MCP clients provide advanced workflows for power users.

• ChatGPT: Best for quick, conversational insights. No desktop setup required.
• Claude Desktop: Ideal for users who prefer Anthropic’s AI and desktop workflows.
• Other MCP clients: Use these for specific integrations or advanced setups.

Choose the client that aligns with your workflow and preferences.

• Authentication failed: generate a fresh Word + PIN and try again.
• No data visible: ensure the app has health permissions and stays open.
• MCP server not found: confirm the MCP server/package is installed or the Claude bundle is enabled; restart the client.
• Connection lost: check network connectivity and restart the session.

VytalLink does not provide medical advice, diagnosis, or treatment. For medical questions, consult a qualified professional.

ChatGPT is ideal for quick, conversational insights without any desktop setup. MCP clients, like Claude Desktop or VS Code, are designed for advanced workflows and professional use cases.

If you close the app, the connection to your AI assistant is paused, and no new data will be relayed. To resume, simply reopen the app and restart the session.

No, VytalLink requires an active internet connection to securely relay your health data to your AI assistant.

VytalLink accesses only the health metrics you approve, such as sleep, workouts, steps, and heart rate. You have full control over what data is shared during each session.

Your privacy is our priority. VytalLink uses encryption to secure your data and operates as a stateless relay, meaning no data is stored. You control what is shared and can disconnect at any time.

1. Your wearable might not sync all data to Apple Health (iOS) or Health Connect (Android). Ensure your device is properly connected and syncing.
2. Some wearables only share limited data. For example, they might log a sleep session but not provide detailed sleep stages (like deep or REM sleep).

Yes, you can connect to multiple AI clients simultaneously. However, we recommend maintaining a single active connection for simplicity and to avoid potential data conflicts.