Track her cycle. Period.

Period. is a private period tracker for partners. It shows a likely date range instead of pretending one predicted day is certain. THREE WAYS TO LOG • She told you: the strongest guide to when her period started. • You saw it yourself: strong evidence, but the exact start may be less clear. • You think so: a hunch can move the estimate, but never make it more certain. A RANGE YOU CAN TRUST See the next likely period as a band, with plain-language confidence. The range widens when the app has less evidence and becomes sharper as confirmed cycles are added. MORE THAN THE NEXT PERIOD View estimated ovulation, the fertile window, cycle phases, and a calendar that stays honest about uncertainty. These are estimates, not contraception or medical advice. PRIVATE BY DESIGN No account. No server. No analytics. No HealthKit. Everything stays on this iPhone. Lock the app with its own PIN and…