How can we help?

Subscriptions are managed by Apple. On your iPhone, open Settings, tap your name, then Subscriptions, and choose Halcyon. You can also get there from Halcyon: open your profile from the Today tab and tap Manage subscription. Deleting the app does not cancel the subscription.

Tap Restore purchases on the subscription screen. Make sure you are signed in to the same Apple account you used to buy Halcyon.

Apple handles refunds for App Store purchases. Request one at reportaproblem.apple.com.

Your logs are kept in your Halcyon account, on servers in the EU, so they come back when you sign in on a new phone. Apple Health data stays on your phone. We never sell your data or use it to train AI.

Open your profile from the Today tab and tap Export my data. You get a file you can save or share. For your doctor, use Export PDF on the Summary tab.

Open your profile from the Today tab and tap Delete account. This permanently erases your account and every log on it. It cannot be undone. If you subscribed, cancel the subscription separately in your Apple settings.

No. Halcyon is a diary, not a medical device. It does not diagnose or treat any condition and is not for emergencies. Please talk to your doctor, nurse or pharmacist about your symptoms and treatment.