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Terms of Use
Plain terms for a free tool.
What the service is
Period Tracker Free provides calendar-based estimates of period dates, fertile windows and ovulation for general information. It is free to use and requires no account.
Not medical advice
The tracker and guides do not diagnose, treat or prevent any condition, and do not confirm ovulation or pregnancy. They are not a substitute for advice from a qualified healthcare professional.
Not contraception
Estimates can be wrong. Pregnancy is possible on any day of the cycle, including outside the estimated fertile window. Do not use this service as a method of contraception.
Your data
Information you enter stays in your browser. You are responsible for who has access to your device and browser profile, and for anything you print or save. See the privacy policy.
No warranty
The service is provided “as is”, without warranties of any kind. To the extent permitted by law, we are not liable for any loss arising from use of, or reliance on, the estimates, or from loss of data stored in your browser.
Changes
We may update these terms; the date at the top of this page shows when they last changed.