Otty

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

If you track your own cycle, you get the full toolkit on your own: phase mapping, quick daily check-ins, symptom patterns by phase, and a personal comfort kit. If you track your partner's cycle, you get specific phase-aware tips so you stop guessing what helps. If you pair up in the app, everything connects: check-ins, comfort preferences, love notes, and nudges reach the right person at the right time.

Beyond tracking, couples get Comfort Coupons (real promises like a blanket-burrito evening, granted ahead and cashed in when they are needed), Deck Night (300 original conversation cards across six decks, played together on one phone), a Comfort Menu (say once what actually helps in each phase, and your partner sees the right list at the right time), date ideas, and relationship milestones.

Cycle data is stored locally by default, sign-in is optional, and partner sharing is opt-in item by item. Fronted by a friendly sea otter mascot, closer in spirit to Duolingo than to a clinical health app. Available in English, Spanish, and French. iOS, free to try with a subscription for the full feature set.