CNR

Feather is a private, voice-first menstrual cycle companion. People rarely remember their cycles as calendar dates; they remember moments like “two days before Onam” or “the week of my friend’s wedding”. With Feather you say it the way you remember it. Feather turns spoken or typed phrases into a structured log entry, resolves festival and holiday landmarks to exact dates from a verified table, and shows a review slip; nothing is saved until you confirm. You can also check upcoming events, like a wedding or an exam, against your estimated window, in neutral wording (likely, possible or unlikely overlap, always labelled as an estimate). Cycle data stays on your device in localStorage, with optional AES-GCM App Lock. There are no accounts and no server database. Feather is for logging and planning only, with a two-layer guardrail that refuses medical, fertility and contraception questions.