PeakDay App Archives - Natural Family Planning | Fertility Awareness

St. Carlo Acutis: Patron Saint of the PeakDay App

This October, CCL has a special reason to celebrate. For the first time, we celebrate the feast day of St. Carlo Acutis, canonized just last year on September 7, 2025. And around here, Carlo feels a little like family. When we were developing the PeakDay app, we knew we were taking on something that would…

PeakDay at the Live Action Women’s Summit

There are certain events that leave you feeling both energized and deeply grateful. Representing PeakDay and Couple to Couple League at this year’s Live Action Women’s Summit was one of those experiences. For the second consecutive year, CCL and PeakDay exhibited at the Summit, and it was a privilege to share our pro-life, fertility awareness…

10 Things I Learned About My Menstrual Cycle That Changed Everything

For years, I thought my cycle was random and unpredictable, just something I had to deal with every month. I relied on calendar predictions and period apps, assuming ovulation always happened on day 14. The moment I began paying attention to my body’s real signals, everything started to make sense. Understanding fertility and hormones turned…

A Warm Welcome for NFP at AAPLOG 2026

The 2026 meeting of the American Association of Pro-Life Obstetricians and Gynecologists (AAPLOG) brought together hundreds of physicians, students, nurses, and healthcare professionals in Seattle—many of whom are eager to learn more about fertility awareness and restorative reproductive medicine. With 334 registrants and strong student participation, the conference offered an encouraging glimpse of a growing…

PeakDay on the Catholic Airwaves

The Couple to Couple League’s Executive Director, Katie Zulanas, has been a sought-after guest on Catholic radio in recent weeks. She is bringing the message of faith-based fertility education and a totally Catholic fertility tracking app to listeners across the country. The Catholic Morning Show On The Catholic Morning Show, Katie explained how the PeakDay…

PeakDay Syncs with Your Life

Tracking your fertility shouldn’t feel like another chore at the start of every day. That’s why PeakDay, CCL’s premier cycle tracking app rooted in science-based fertility education, now syncs with popular wearable devices to make temperature tracking easier and more consistent than ever. Device Syncing PeakDay pairs seamlessly with Apple Watch, Fitbit, and the Oura…

What We Heard at the SEEK Conference

As exhibitors at SEEK in both Columbus and Denver—a five-day experience where thousands of college-age Catholics come together to encounter Christ through prayer, Adoration, the sacraments, and inspiring speakers—we expected good conversations. What we didn’t fully anticipate was how ready these young women (and men!) were to talk openly and thoughtfully about fertility and faithful,…

Inside PCOS: Understanding the Hormonal Puzzle

“PCOS is one of the leading causes of infertility in women and the most common reason for irregular periods,” said Lauren Rubal, M.D., a reproductive endocrinologist from Newport Beach, Calif. According to the National Polycystic Ovary Syndrome Association, one in ten women have PCOS, but half remain undiagnosed. Recognizing the Symptoms PCOS symptoms include irregular…

Perimenopause and the PeakDay App

Women often wonder when their fertility will begin to change and what symptoms and charting changes they will experience. Many women have very regular cycles and predicable charts that they have relied upon for years, so they become nervous when they start experiencing different cycles and observations during their perimenopause years. In the image below,…