CycleCal syncs your cycle phases straight to your Apple Calendar, gently notices when your schedule doesn't match your energy, and keeps your partner in the loop — all without your data ever leaving your phone.
Free core tracking · $5.99/mo premium · No ads, ever
"Every month I forgot I was about to be exhausted, booked a week of coffees during luteal, and felt like my body was the problem. It wasn't. My planning was."
Log when your period starts, mark each phase as you feel the shift, and let CycleCal handle the rest.
Log your period start and move through each phase — menstrual, follicular, ovulation, luteal — with a single tap. Your cycle length learns from your real data.
Your four phases appear as color-coded events directly in your Apple Calendar. See where you are in your cycle right alongside your meetings, plans, and life.
Gentle reminders when your schedule doesn't match your energy — based on your real calendar and real cycle, not generic advice. Opt-in, premium.
Optional email alerts to your partner — period start, fertile window, late luteal gentle reminders. Premium. You choose what, when, and to whom.
Four features that make the difference between tracking your cycle and actually using that information to live better.
Automated, consent-based email alerts to your partner(s) when your phase shifts — period start, fertile window, late luteal.
Connect sleep, heart rate, and activity from Apple Health so your insights reflect your whole body, not just your cycle.
AI-powered analysis of your calendar + cycle + health data. Weekly deep read, plus quiet background notifications.
Share your cycle history, symptoms, and context once. Your insights become specific to your body, not generic.
Cancel anytime in Settings. Auto-renews monthly until canceled.
Most period apps store your cycle on their servers and ask you to trust them. CycleCal doesn't ask for that trust — because there's no server with your data on it to begin with.
Nothing to sign up for. No email required. Your cycle data lives on your phone and only on your phone.
We don't operate servers storing your cycle history. There's literally nothing for us — or a breach — to expose.
No ads, no analytics, no third-party tracking. Your data is never bought, sold, or shared.
Smart Insights calls our AI partner (Anthropic) and never stores the conversation. Used once, discarded.
How it actually works
When you tap "period start," that data is written to your iPhone's local storage and stays there. When you ask for Smart Insights, your phone sends a single request to a stateless serverless function that talks to Anthropic and forgets the conversation immediately. No database. No retention. No account tied to you. Nothing to leak — because there's nothing to leak.
CycleCal is launching on the App Store. Check back soon.
Email me when it launches