Otty

Otty is a period and cycle tracker built for couples that works just as well solo. It maps the month into five phases with plain names like Storm (Period) on one shared calendar, and each day it offers one specific suggestion for what helps with mood, energy, and support right now.

If you track your own cycle, you log the day your period starts and Otty paints the month by phase, counts down to your next period, and gives you one tip a day. If you track your partner's cycle, you get the phase she is in and one concrete thing to do today. If you pair up, both phones show the same calendar and the same daily check-in, and she chooses what is shared.

Couples also get a Comfort Menu (she writes what helps in each phase in her own words), ninety Comfort Coupons to promise ahead of time, Deck Night with 300 conversation cards across six decks, love notes, and relationship milestones.

Cycle data is stored on your device by default, sign-in is optional, and partner sharing is opt-in item by item. Otty is available on iPhone in English, Spanish, French, German and Portuguese.