PeriodlyWise

About the business

PeriodlyWise is a privacy-first menstrual cycle website that helps people estimate period dates, ovulation timing, fertile windows, and irregular-cycle patterns. The tool uses your last period date, average cycle length, period length, and cycle regularity to generate estimates shown as ranges rather than exact dates, acknowledging that periods can change due to stress, travel, illness, medication, and other factors.

The platform offers multiple cycle-tracking tools including a standard Period Tracker for estimating next period and period windows, an Ovulation Tracker for ovulation timing and fertile days, a Fertility Window Tracker for broader fertile-window context, and an Irregular Period Tracker for tracking cycles that don't follow a consistent pattern. Users can access basic tools without creating an account, and optional account features allow saving period records, building cycle history, creating shareable summaries, and setting reminders.

PeriodlyWise emphasizes privacy and clarity, designed so cycle information can be used without invasive tracking or overcomplicated interfaces. The site includes educational guides, a medical disclaimer clarifying that it is not a medical device or substitute for professional healthcare, and practical resources for understanding cycle patterns. It is available as a progressive web app installable on phones and desktops, supports multiple languages, and operates under the principle that cycle tracking should be calm, practical, and privacy-conscious.