ChuHe Vaccine Assistant Privacy Policy

Information we handle

• The app stores baby profiles, photos you choose for avatars, selected vaccines, vaccination records, and notes on your device and in your private Apple iCloud database to provide schedules, profile display, record review, sync, and family sharing.
• Reminder enablement, lead time, and reminder time remain on the current device. They are not uploaded to iCloud or shared with family members.
• The current version does not ask for sensitive identity information such as phone numbers or government IDs, and it does not require account creation.
• If you contact us by email, we use the information you voluntarily provide only to troubleshoot issues and respond to your support request.

How we use information

• Generate a vaccination timeline based on the baby's birth date and selected vaccines.
• Store completed vaccination records so parents can review progress later.
• Send local reminders after you grant notification permission.
• After you explicitly send an Apple private invitation, let specified participants access the selected baby's avatar, complete profile, and vaccination plan with either read-only or read-write permission.

Permissions and third parties

• The app uses iCloud and CloudKit for data sync and sharing with specified participants, and remote notifications to trigger background synchronization after changes.
• The app does not read your contacts or offer public sharing links. Apple's system sharing interface handles recipients and delivery channels.
• The free tier uses Google Mobile Ads to display non-personalized ads and Google User Messaging Platform to manage consent and privacy options where applicable. For ad delivery, measurement, analytics, diagnostics, and fraud prevention, Google may process coarse location estimated from IP addresses, device identifiers, ads viewed, interactions such as app launches and taps, crash logs, launch time, hang rate, energy use, and other diagnostics. See the Google Privacy Policy.
• Baby profiles, avatars, birth dates, selected vaccines, vaccination records, notes, and reminder settings are not included in ad requests sent to Google. Lifetime Pro users and customers who paid for the app before version 2.0 do not request or see ads.
• Lifetime Pro purchases are processed by Apple StoreKit. The app uses transaction records supplied by Apple to determine entitlement and does not receive payment card details.

Data controls

• Uninstalling the app removes the local copy on the current device, but it does not automatically delete data already synchronized to iCloud. In the app, you can delete a baby you own, stop sharing, or leave a share created by someone else.
• When an owner stops sharing, the owner's baby data remains. When a participant leaves, the shared data is removed from that participant's devices.
• Where required, users can review or change Google advertising consent choices through “Ad Privacy Options” in the app settings.

Medical notice

This app is intended for organizing, reminding, and recording vaccination plans. It does not provide medical diagnosis or treatment advice. Please follow the recommendations of your vaccination clinic or doctor for actual vaccination timing and decisions.

Contact us

For privacy-related questions, please email support@maydaychen.top.

This app uses Apple's standard EULA.

Voluntary feedback

Only when you send Contact Us feedback are your title, message, selected images and app/build/iOS versions sent over HTTPS to feedback.maydaychen.top for developer support. The feedback service retains submitted content and attachments. It does not automatically read or upload business databases or your full photo library.

You may select up to three images. They are orientation-corrected, resized to a longest edge of 2048 pixels and converted to JPEG, removing original metadata such as location. Visible image content and message text are not automatically de-identified. Do not submit passwords, complete identity documents, ledgers or health records.

A random UUID is generated for each submission for receipts and retry deduplication; it is not a persistent user or device identifier. Request IP addresses may be used for security and rate limiting, not ad targeting or cross-app tracking. This notice does not promise a specific log retention period.

Feedback and technical version information are used for customer support and troubleshooting, not tracking. If the operator enables notifications, the title and a message excerpt may be sent through the configured notification service to the developer to handle support requests.

Feedback and attachments are stored separately by the feedback service. Deleting the app does not delete previously submitted content. To request deletion, contact support@maydaychen.top with the app name, feedback title and approximate submission time.