Privacy policy

1. Who we are

thyro.health is a thyroid tracking app for iPhone, made by an independent developer based in India. In this policy, "we" and "us" mean the developer of thyro.health, "the app" means the thyro.health iPhone app, and "the website" means thyro.health.

If you have a question about privacy, email support@thyro.health.

2. What stays on your phone

Everything you enter in the app is stored only on your iPhone. That includes:

• Lab results, units and reference ranges
• Medications, doses, schedules and dose logs
• Symptom check ins and notes
• Targets from your doctor and retest reminders
• Your first name and conditions, if you add them

This information is never sent to us. The app has no accounts and no sign in, and we do not run a server that holds your records. The app does not contain analytics, advertising or tracking tools.

3. Backups and exports

• iPhone backups. Your app data is included in your iPhone's own backups, such as iCloud Backup or a backup to your computer, if you have those turned on. Those backups are controlled by you and by Apple. We have no access to them.
• Backup files. You can export a backup file from Settings in the app. The file contains your health information, so keep it somewhere safe.
• Reports and CSV files. PDF reports and CSV exports are created on your phone. They only leave your phone when you choose to share them, for example by email or AirDrop.

Once you share a file, it is covered by the privacy practices of whoever receives it and of the service you used to send it.

4. Face ID

If you turn on the Face ID lock, the check is carried out by iOS. The app only learns whether the check passed. We never receive or store your face or fingerprint data.

5. Reminders

Reminders are scheduled on your phone as local notifications. They are not sent through any server.

6. Purchases

thyro Premium is bought through Apple's in app purchase system. Apple processes the payment, and we never receive your card details.

To check whether Premium is active, the app uses a service called RevenueCat. RevenueCat receives:

• A random identifier for your copy of the app
• Details of your purchase, such as the product, the date and the renewal status
• Basic technical information, such as your country, device model and iOS version, and the IP address used to make the request

RevenueCat does not receive your name, your email address or any of the health information you log. You can read RevenueCat's privacy policy and Apple's privacy policy for more detail.

7. Information Apple shares with us

Apple gives developers summary figures such as download counts and sales. If you have chosen to share analytics with app developers in your iPhone settings, Apple may also share anonymous crash and usage reports. None of this identifies you or includes anything you log.

8. The website

The website does not use analytics, advertising or tracking cookies, and it has no sign up forms. It is hosted by Cloudflare. Like any web host, Cloudflare processes technical information such as your IP address and browser type in order to deliver the site and protect it from abuse.

9. When you email us

If you email us, we receive your email address and whatever you include in your message. We use it only to reply and to keep a record of the conversation. Please don't send lab results or other health details unless they are needed to solve your problem. You can ask us to delete your emails at any time.

10. How we use and share information

We use the limited information described above to provide Premium, answer support requests and keep the website running. We do not sell personal information, we do not share it for advertising, and we do not build profiles of people.

11. Your choices and rights

Because your health information lives on your phone, you control it directly. You can edit or delete any entry in the app, erase everything with "Delete all data" in Settings, or remove the app from your phone.

Depending on where you live, you may have legal rights over personal information that we hold, such as the right to see it, correct it or have it deleted. In practice this covers emails you have sent us and purchase records. To use these rights, email support@thyro.health. You may also have the right to complain to the data protection authority where you live.

12. Security

Your records are protected by your iPhone's built in encryption when the phone is locked with a passcode, and you can add the Face ID lock for the app itself. No system is perfectly secure, so keep your phone and any exported files protected.

13. Children

thyro.health is intended for adults. It is not directed at children, and we do not knowingly collect personal information from children.

14. Changes to this policy

If we change this policy, we will update the date at the top of this page. If a change is significant, we will also mention it in the app or in the App Store release notes.

15. Contact

Email support@thyro.health.