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…