Period Tracker is a free web app for logging your period, symptoms and moods. Its AI chat, called Ask, reads your own cycle history and answers questions in plain words, from first period basics to what your logs show. Each month you get a report with tips based on your records. You also get email reminders before your next period, alerts when cycles turn irregular, partner sharing and 21 calculators that work without an account. It runs in any browser with nothing to install.
