Frequently asked questions
What is Health to AI?
An iPhone and iPad app that securely connects the Apple Health data you choose with compatible AI tools through authorized MCP or read-only API connections. You decide what to sync, which tools can read it and when access ends.
Which devices are supported?
iPhone and iPad with iOS / iPadOS 17 or later, with Apple Health available.
How much does it cost?
Health to AI is free to download on the App Store.
Can AI read my Apple Watch data?
Yes, through Health to AI. Apple Watch data syncs to the Health app on your iPhone automatically, and Health to AI lets ChatGPT, Claude or another AI you authorize read the types you choose. Here’s how.
Which AI tools can I connect?
What is MCP?
The Model Context Protocol is an open standard that lets AI assistants connect to external data and tools. Health to AI provides a remote MCP server secured with OAuth. Learn more.
What’s the difference between MCP and an API key?
MCP with OAuth lets an AI client sign in and request data through standard tools. A read-only API key is a credential you create for clients that support API access. Both are read-only and individually revocable.
Does the app have a built-in AI chat?
No. It connects your data to the AI service you already use.
Which health data can I share?
100+ types across activity, sleep, heart, body measurements, nutrition, workouts, mindfulness and more. See the list.
Does it sync in real time?
Background timing is controlled by iOS, so real-time sync isn’t guaranteed. You can check sync status and open the app to sync manually anytime.
Is my data encrypted?
Yes. Data is encrypted on device with AES-256-GCM before upload, and the cloud stores ciphertext.
Do you sell my data or use it for AI training?
No. There is no ad tracking, and health data is not sold or used for advertising, profiling or model training.
How do I see what an AI has read?
Open Connect AI → Recent access. Access history is kept for 90 days.
How do I revoke access?
Revoke an individual connection or API key in the app at any time. Future reads stop immediately.
How long is my data stored?
Cloud health data is automatically deleted after 180 days without a successful authorized AI query, counted from the first sync or the latest successful query. You can delete everything immediately in Settings.
Does Health to AI change my Apple Health data?
No. It never writes to Apple Health.
Is this medical advice?
No. Health to AI does not provide medical diagnosis or treatment advice. Consult a qualified professional for health decisions.
Which languages are supported?
English, Simplified Chinese, Traditional Chinese, Japanese and Korean. The app follows your system language, or you can choose one in Settings.
Who makes Health to AI?
GRAVITY Inc. (株式会社引力). Contact: rex@gravitylab.co.jp.
