Cylune: Private Cycle Tracker

Cylune is a beautifully simple period calendar that keeps your cycle information on your device. Cylune works entirely offline, without ads, accounts, tracking, cloud storage, or external services. It is thoughtfully created with enduring care for women and deep respect for their privacy. View and edit all periods in one calendar. Tap any day to select it—and tap again to remove it. One missing day remains part of the same period; longer gaps create separate periods automatically. PRIVATE BY DESIGN • No account or sign-in • No advertising, analytics, or tracking • No cloud synchronization • No third-party health SDKs • Cycle entries stay in the app’s private storage CALM, USEFUL AWARENESS • Edit, add, or remove period days in one fast calendar • Adjust period length and rhythm • See unselected days predicted from the first logged day • Automatically complete elapsed days in an active…