Catholic cycle charting · Built on the Billings Method
Understand your body.
Honor God’s design.
Corvia helps women observe, chart, and understand their fertility through Catholic faith, sound science, and respect for the female body.
Free for 30 days.
Why Corvia
Understanding your body in every season.
Whether you are just beginning, growing in understanding, or bringing cycle awareness into married life, Corvia meets you where you are.
Beginning womanhood
I’m just beginning.
A gentle introduction to your cycle and the natural signs your body is beginning to show.
Begin here →Understanding my cycle
I want to know my body better.
Observe, chart, and learn your body’s rhythm with clear guidance and no assumptions about your season of life.
Start learning →Married
I want to bring faith into our decisions.
Corvia helps you understand your cycle and approach fertility with prayerful intention. Spouse and instructor sharing are available whenever that support feels right.
See how Corvia supports marriage →The Corvia Experience
Body and soul belong in the same conversation.
Cycle charting, guided learning, prayer, and trusted support, thoughtfully woven together.
Pray
Keep body and soul together.
Prayer, the Rosary, and faith-centered reflections meet you within the same experience as your cycle. Faith is not an add-on. It is part of the whole.
Saints & Feasts
Walk with the saints.
Choose the saints you hold close, and bring their intercession into your daily prayer. Feast days appear quietly throughout your chart, a gentle reminder that your days unfold within the rhythm of the Church.
Observe
Notice your body’s pattern.
A gentle daily check-in helps you record what you notice and see patterns unfold across weeks and months. No scores. No pressure. Just greater clarity over time.
Learn
Learn the language of your body.
Clear, grounded guidance helps you understand your cycle through the Billings Ovulation Method. No jargon. No feeling like a patient.
Share
Share with people you trust.
Securely share your chart with your spouse or instructor for clearer conversations, shared understanding, and greater peace of mind.
How Corvia works
A simple daily practice. A clearer understanding over time.
Observe
Take a quiet moment to notice what your body is saying: sensation, appearance, bleeding, and mood. It takes about a minute.
Chart
Save what you noticed, and Corvia places it on your Billings color chart. Each observation begins to reveal your cycle’s rhythm.
Understand
As the days and months unfold, patterns become easier to see. You learn to read your cycle with greater clarity and confidence.
The Billings Method
A 70-year-old method. A brand-new app.
The Billings Ovulation Method was developed by two Catholic physicians in the 1950s, validated by the World Health Organization, and taught by certified instructors worldwide. Corvia is built to their standard.
Read the method →The privacy promise
Your cycle is personal.
We will never sell your data.
Not to advertisers. Not to insurance. Not to anyone. Ever.
Private by design.
Cycle data is encrypted. Your most intimate details are kept separate and never shared unless you choose to share them.
You can delete everything.
One tap in your profile. We follow Washington's My Health My Data Act and California privacy law.
What women say
Real cycles. Real stories.
“I had used other cycle apps before, but they always made me feel like I was chasing a prediction. Corvia helped me slow down, notice what my body was saying, and finally see a pattern that made sense.”
“Corvia has helped me see my cycle with more peace and less anxiety. The faith content feels natural and thoughtful, not forced. It reminds me that my body is something to understand, not something to fix.”
“Corvia has made it easier for my husband and me to talk about my cycle without taking the experience out of my hands. I feel supported, more confident in what I am observing, and clearer in the decisions we make together.”
“I stopped tracking my cycle years ago because every app felt like it was tracking me. Corvia doesn’t.”
“My daughter is fifteen. This is the app I trust her to open.”
From the journal
A place to learn, reflect, and grow.
Cycle education and faithful encouragement for every season of womanhood.
Native apps are coming soon.
Available now on the web.
Access Corvia from any browser, including your phone. Native iOS and Android apps are on the way.
Before you begin
Frequently Asked Questions
Is Corvia a Catholic app?
Yes. Built by a Catholic husband-and-wife team, in alignment with Catholic teaching on the person.
Do I have to be married to use Corvia?
No. Beginning womanhood and Understanding my cycle are for any woman who wants to understand her cycle. Married is for married couples.
Is it safe for a teenager?
Yes. Beginning womanhood is designed for teen use with no fertility framing, no intercourse tracking, and no ads. See For Mothers.
Does Corvia tell me when I am fertile?
No. Corvia records what you observe and shows you the pattern. All cycle-related decisions remain with you.
Do I need a Billings instructor?
You do not need one to start. The learning paths are fully self-guided. For couples, working with an instructor is encouraged. See For Instructors.