Frequently asked questions常见问题

No. YesHealth works without sign-up, login or an email address. Just open the app and choose what to share.

On your iPhone. Health data, synced device data, notes and summaries are stored locally in the app; connection sign-ins are kept in the iOS Keychain. We don’t operate a server that stores your health data. For some device connections, a minimal sign-in service is used only to exchange login tokens — it does not store your health data. See the Privacy Policy for details.

Because there is no account or cloud sync, your data never sits on our servers. Coming in 1.1: create a password-encrypted backup file in the app, send it to your new iPhone with AirDrop or save it in Files, then open it in YesHealth and enter your password. Only you hold the file and the password — we can’t recover either. Already in 1.0, you can export a copy of your data as JSON at any time (open formats including CSV are planned for 1.1).

Coming in 1.1. Bring your own AI and switch any time: OpenAI, Claude, Gemini, DeepSeek, Qwen (通义千问), Kimi, any OpenAI-compatible endpoint, or Apple’s on-device model on supported iPhones. Your data follows you, not any single AI model. Requests go directly from your iPhone to the provider you choose, under that provider’s terms — never through us. AI features are optional; everything else works without them.

Coming in 1.1. Nothing is sent unless you use an AI feature with a cloud provider, and you always see a preview of exactly what will be sent and must confirm it first. Before anything leaves your phone, personal information is removed or generalised: name, phone, email, address, ID numbers, exact birth date (replaced by an age band), location, device and account IDs, names inside your notes, and photo GPS / EXIF data. Dates are made relative (for example “day 3”), and for checkup report scans only the lab values are sent, not the image. With Apple’s on-device model, nothing leaves your iPhone at all.

Coming in 1.1. Food log: add a meal by photo or text plus a portion size; AI estimates calories, protein, carbohydrates, fat and fibre, you can edit every number, and meals are shown alongside your activity, weight and glucose. Checkup reports: upload a PDF or photo of a lab report; the text is recognised on your iPhone, AI organises the indicators with their reference ranges and out-of-range flags, and you can follow multi-year trends next to your wearable data. Estimates and summaries are for reference only and are not a diagnosis.

Cloud AI providers decide where their services are offered, and some may be unavailable or hard to reach in certain regions, including mainland China. That is up to each provider and your network, not YesHealth. Whatever your region, all existing features keep working, and in 1.1 Apple’s on-device model (on supported iPhones) or any OpenAI-compatible endpoint you can legally reach can be used instead. Please follow the laws and the provider terms that apply to you.

Yes. Apple Health on your iPhone is enough — for example, iPhone counts steps on its own. Wearables add more detail but are optional.

YesHealth is an iPhone app. It reads Apple Health (heart rate, activity and steps, sleep, and optionally weight and blood glucose), so anything that writes to Apple Health — such as Apple Watch — can show up. It can also connect directly to Oura, Garmin and Dexcom. Some direct connections may show as “Coming soon” while they roll out.

No. YesHealth is not a medical device and does not diagnose, treat, prescribe or recommend doses. Insights describe trends in plain language for reference only. Talk with a licensed clinician about medical questions, and call your local emergency number in an emergency. See the medical disclaimer.

For your safety, the chat only describes trends in your own data. It is designed to refuse requests to diagnose a condition, prescribe or change medications, or suggest doses (including insulin), and will point you to a licensed clinician — or to emergency services when appropriate.

Delete individual medication or symptom notes in the app, disconnect devices on the Devices tab, and turn off Health access in iOS Settings. To remove everything, delete the app — all YesHealth data lives on your iPhone. There is no account or server copy for us to delete. More in Support.

YesHealth is a one-time paid download on the App Store. There are no subscriptions, ads or in-app purchases. The price shown in the App Store for your region applies.

English and Simplified Chinese. The app follows your system language by default, and you can change it in Profile › Language. This website also has a language menu (English / 中文) at the top of every page.