Once does not collect, store, or transmit any personal information. No analytics, no tracking, no third-party services.
Your list of blocked websites and settings are stored locally in your browser using Chrome's storage API. This data never leaves your device.
Once doesn't require an account. There's nothing to sign up for and no credentials to manage.
Don't take our word for it. Once is open source — you can read every line of code yourself.
If you have any questions about this policy, open an issue on GitHub.