Privacy Policy
Last updated: July 2025
Introduction
Halcyon is a macOS menu bar app that detects idle time and puts your Mac to sleep. This policy explains how the app handles information.
Data collection
This app collects no personal data whatsoever.
- No network requests are made
- No data is sent to external servers
- No analytics or tracking tools are used
- No account registration is required
Locally stored data
The app stores the following settings only in your Mac's local storage (UserDefaults).
- On/off state and wait time for each action step
- Auto sleep on/off state
- Debug log on/off state
All data stays on your Mac and is never transmitted externally. Deleting the app removes this data.
System access
The app uses the following macOS capabilities.
- HID event monitoring: reads the timestamp of the last keyboard or mouse input to determine idle time (input content is never captured)
- Screen saver, display, and sleep control: uses standard macOS commands
- Login item registration: used for the "Launch at login" setting
Policy changes
If this policy is updated, this page will be revised with a new last-updated date.
Contact
For questions about this policy, please reach out to @ra1ch4.