VWD Tracker — Privacy Policy

Last updated: 25 September 2026

VWD Tracker (“the app”) is a personal record-keeping aid that helps people living with von Willebrand disease, and their families, log bleeds, treatments, medication and related health information on iPhone, iPad and Apple Watch. This policy explains what the app does with your information. VWD Tracker is designed to be private by default: your records belong to you, live in your own Apple devices and iCloud account, and are never sent to us.

The short version

• Your records stay on your devices and, if you enable iCloud, in your own private iCloud account.
• We operate no servers that receive your health data. The developer cannot see your records.
• There is no account to create with us, and no analytics, advertising, tracking or third-party data-collection software in the app.
• We do not sell, rent or share your data with anyone.
• If you share your family’s records with another person, that sharing happens directly between your Apple accounts, using Apple’s iCloud sharing. We are not part of it.

Who we are

VWD Tracker is developed and published by the developer contactable at info@ten13.co.uk (“we”, “us”). Because the app does not transmit your records to us, we do not hold or process your health data. Where data protection law applies, the person using the app is in control of the records they keep.

Information the app stores

Everything below is entered by you, or by a family member you have chosen to share with, and is stored as your personal records:

• People — name, date of birth, sex, VWD type, blood type, baseline VWF, weight, diagnosis date, treatment centre, haematologist name and contact, other care contacts, emergency notes, an optional emoji and an optional photo.
• Bleed records — start and end time, duration, which device started and stopped a timed bleed, body site, severity, cause, pain score, notes and optional photos.
• Treatments and medication — product, dose, route, indication, lot or batch number, expiry date, course length, effectiveness and notes; medication inventory; and reminders you set.
• Bleed-score assessments you complete in the app.

Much of this is health data, and some of it may concern a child when a parent or guardian records it. Sensitive fields are encrypted in iCloud using Apple’s CloudKit encrypted-field protection, so that they are unreadable outside your devices.

Where your data is stored

• On your devices. Records are saved locally on each iPhone or iPad where you use the app. The Apple Watch app and the Home Screen, Lock Screen and Watch widgets keep only the current bleed-timer state (whether a timer is running, when it started, the person’s name and the time of the last bleed) in a storage area shared between the app and its widgets on that device.
• In your private iCloud. When you are signed in to iCloud, your records sync through Apple’s CloudKit to your own private iCloud database, so they are available on your other devices and can be restored after a reinstall. That data lives in your Apple account, governed by Apple’s Privacy Policy. We have no access to it.
• Family sharing (optional). If you choose to share a family’s records, the app uses Apple’s CloudKit sharing so that the people you invite by their Apple Account can view, or view and edit, the shared records on their own devices. You decide who is invited, what they may do, and you can change or remove their access at any time. Sharing happens directly between Apple accounts; we never see the contents. Records a family member adds are stored in the family owner’s iCloud account.
• Lock Screen and Dynamic Island. While a bleed timer is running, the app may show a Live Activity on that device. It contains only the person’s name and the elapsed time, and it is handled entirely by iOS on the device.

Information we do not collect

VWD Tracker contains no analytics, no advertising identifiers, no usage tracking, no crash reporting service of our own, and no third-party marketing or data-broker software. We do not build profiles of you. If you choose to share a diagnostic report with us by email, it contains only what you can see on the screen you copied it from, and you decide whether to send it.

Notifications

Reminders you set (for example a dose, an appointment, a medication about to expire, or a prompt to record how well a treatment worked) are scheduled as local notifications on your device. They never leave the device. The app also registers for silent iCloud notifications, which carry no content and only tell the app that your own iCloud data has changed.

Photos

You may attach a photo to a person or a bleed record. The app asks for access to your photo library or camera only when you choose to add one, uses only the photo you pick, and stores it with your records as described above. Photos are not included in the app’s JSON or CSV exports.

Subscriptions, payments and offer codes

The optional subscription is sold and processed by Apple through the App Store. We never receive your payment-card details or your Apple Account credentials. Apple may share aggregate, non-identifying sales information with the developer. Subscriptions are managed in your Apple Account settings. If you redeem an offer code, the redemption is handled by Apple and tells us nothing about you.

Face ID, Touch ID and passcode lock

You can optionally lock the app with Face ID, Touch ID or a passcode. Biometric data is handled entirely by iOS and is never accessible to the app. An app passcode you set is stored securely in the device Keychain.

Your choices and control

• Export. Export a complete copy of your records as JSON or CSV at any time, for your own backup or to move to another app. Export is never restricted by subscription.
• Import. Load a JSON export back into the app.
• Delete. Delete individual records or people, or use “Delete all iCloud data” in Settings to permanently remove every record you own from the device and from your iCloud. Deleting the app removes its local data from that device.
• Sharing. As a family owner you can change what each person may do, remove them, or stop sharing entirely. As a family member you can leave a family at any time, which removes the shared records from your device.
• iCloud. You control syncing through your device’s iCloud settings.

Depending on where you live, you may have rights under data-protection laws such as the UK GDPR and the EU GDPR, including rights to access, correct, export, restrict and delete your information. Because your records are held on your own devices and in your own iCloud account, you can exercise these rights directly within the app. If you need help, contact us using the details below.

Children’s privacy

VWD Tracker is intended to be used by adults, including parents and guardians recording information about a child in their care. We do not knowingly collect data directly from children, and no entered data is transmitted to us.

Security

Records on your device are protected by iOS device encryption. In iCloud, sensitive fields are stored with CloudKit encrypted-field protection, and all iCloud transfer is encrypted in transit. The optional app lock adds a further barrier on the device itself. No system is perfectly secure, and the strength of the protection also depends on the passcode and Apple Account security you use.

Data retention

Because we do not receive or store your records, retention is entirely under your control. Your data remains until you delete it from your devices and iCloud, or until Apple removes it under the terms of your Apple Account.

Changes to this policy

We may update this policy as the app evolves. Material changes will be reflected by updating the “Last updated” date above and, where appropriate, within the app. The current version is always available inside the app and at the address where this page is published.

Contact

If you have any questions about this policy or your data, contact us at info@ten13.co.uk.

VWD Tracker is a personal record-keeping aid. It is not a medical device and is not a substitute for professional clinical assessment.