Halcyon Privacy Policy
Effective: 15 August 2026
Halcyon is designed so that your personal data stays with you.
What we collect
Nothing. Halcyon does not collect, transmit, or store your data on any server. It has no user accounts and requires no sign-in.
Where your data lives
Your mood entries, emotions, tags, and notes are stored only in Halcyon’s private storage on your device. They are not backed up to any cloud service by Halcyon and are excluded from system cloud backup.
Sharing
We do not share your data with anyone, because we never receive it.
Exports
You can create a backup file of your data at any time. That file is yours; you choose where it goes. Anything that happens to it after you export it is under your control.
Analytics & ads
Halcyon contains no advertising and no third-party analytics or tracking.
Deleting your data
Delete individual entries in the app, or remove all data by clearing the app’s storage or uninstalling Halcyon.
Children
Halcyon is not directed at children under 13.
Contact
Changes
If this policy ever changes, the updated version will be posted here with a new effective date.