Last updated: February 2026
By creating an account or using Day One, you agree to these terms. If you do not agree with any part of these terms, please do not use the service.
Day One is a free habit tracking tool that helps you monitor habits you want to quit or build. The service is provided as-is, with no guarantees of uptime, availability, or uninterrupted access. Features may be added, changed, or removed over time.
You are responsible for keeping your login credentials secure. Do not share your password with anyone. Each person should have only one account. You must provide a valid email address when registering.
We reserve the right to suspend or terminate accounts that violate these terms or are used in ways that harm the service or other users.
You own your data. We do not claim any rights to the content you create, including habit names, reasons, check-in records, or any other information you enter. For details on how we handle your data, see our Privacy Policy.
You agree not to:
Day One is provided “as is” and “as available” without warranty of any kind, whether express or implied. We are not liable for any losses or damages arising from your use of the service, including but not limited to:
Day One is a personal tracking tool. It is not a substitute for medical advice, therapy, counseling, or any professional treatment. If you are struggling with addiction or mental health, please seek help from a qualified professional.
We may update these terms at any time. If we make significant changes, we will notify registered users. Continued use of the service after changes are posted constitutes acceptance of the updated terms.
If you have questions about these terms, email us at [email protected].