PetalCycle: Private Tracker

Know your cycle without pretending every body runs on a fixed date. PetalCycle turns period starts and optional daily signals into clear cycle ranges. See an estimated next period, an estimated fertile window, and how confidence changes as you log more cycles. Log flow, mood, symptoms, cervical mucus, LH results, basal temperature, and private notes in seconds. Review your month in a playful calendar and see recent cycle lengths over time. Your cycle history stays in the app's local SwiftData store. There is no account, advertising, analytics SDK, tracking, subscription, or developer-operated backend. Predictions are calendar estimates, not confirmation of ovulation. PetalCycle does not diagnose fertility, provide contraception, or replace qualified medical care. Do not use it to prevent pregnancy.