PeakDay Fertility Tracker
Fertility Science Institute Health & Fitness In-app purchases
Period, cycle, ovulation calculator to learn & manage your fertility using NFP.
- Rating
- 3.5
- 625 ratings
- Downloads
- 449K+
- on Google Play
- Price
- Free
- In-app purchases
- Updated
- Jun 18
- 2026 · v3.0.18
Screenshots
About PeakDay Fertility Tracker
PeakDay is a fertility cycle tracker that can be used for period charting or to assist with the practice of natural family planning. To help figure out your peak fertility for pregnancy, you record your daily fertility signs or symptoms, like basal body temperature and cervical mucus.
Couple to Couple League uses this app in CCL and LLP classes to learn the Sympto-Thermal method of NFP.
PeakDay is your partner for a happier, healthier, smarter fertility.
PeakDay can be used for free for women looking to simply track their period and chart their ovulation cycle. The PeakDay premium version allows women to chart their fertility cycles and log health information to help determine their fertility phase and situation.
PeakDay provides you with an easy way to chart your cycle and connect with a community of fertility coaches to ask questions. You can also use PeakDay to share charts with a teacher or doctor. Charts and data can be accessed from multiple devices, so both husband and wife can be involved in charting and grow in fertility awareness.
For more than 50 years, thousands of couples have learned NFP with CCL and trusted our algorithms to help them track and interpret their cycles to determine peak fertility. Now, we are using that same highly effective formula and algorithm behind PeakDay. It’s trusted and has a proven success rate for over 10,000 users (previous version known as CycleProGo app.)
10 Ways PeakDay can work for you:
1. Track your cycles. Easy to chart your menstrual cycle and ovulation by simply inputting your symptoms and signs each day.
2. Manage your fertility goals. You can naturally plan your family by using the fertility phase information to achieve pregnancy.
3. Predict the PeakDay of your fertility so that you can make sound fertility decisions.
4. Connect with our fertility community. Participating in the message boards and forums on PeakDay puts you in touch with fertility coaches for guidance and greater knowledge.
5. Share your charts and cycle history with real fertility coaches on the app or even connect your account to a fertility teacher.
6. Easy to use to practice NFP. PeakDay is fully compatible with CCL’s Sympto-Thermal method of Natural Family Planning and is used in both CCL and Liga de Pareja classes.
7. Custom tracking of over 60 fertility symptoms and signs. You can choose what you want to track daily by personalizing the settings.
8. Compare your personal cycle history. To better understand your body and fertility, you can keep cycle history which can help discover patterns in your cycles. The comparing tool allows you to look at 6 months of cycles and see your personal cycle statistics.
9. Learn about women’s health and grow in fertility awareness. Our online learning center is connected to PeakDay with videos explaining the basics about fertility, cycles and how biomarkers like mucus and temperature are important to fertility tracking.
10. Your data is in your hands. PeakDay is password protected and allows you to keep the account private or share your account with a spouse, a fertility expert or even with your doctor.
Looking for a reliable and simple fertility ovulation tracker or health app for women? Download PeakDay today to make that happen. Visit Peakday.com for more information about pricing, subscription options and learning materials.
To learn CCL’s STM NFP method, please visit www.ccli.org. If you are looking for a NFP class in Spanish, visit www.ligadepareja.org For fertility coaching and other programs, visit www.fertilityscienceinstitute.org
If you are having technical issues or have any questions, we are here to support you. [email protected]
For full Privacy Policy and our Terms of Service: https://peakday.com/terms/
Disclaimer: This tool should not be used for medical purposes or as a substitute for medical advice. Actual performance and results are not guaranteed. Use at your own risk.
Couple to Couple League uses this app in CCL and LLP classes to learn the Sympto-Thermal method of NFP.
PeakDay is your partner for a happier, healthier, smarter fertility.
PeakDay can be used for free for women looking to simply track their period and chart their ovulation cycle. The PeakDay premium version allows women to chart their fertility cycles and log health information to help determine their fertility phase and situation.
PeakDay provides you with an easy way to chart your cycle and connect with a community of fertility coaches to ask questions. You can also use PeakDay to share charts with a teacher or doctor. Charts and data can be accessed from multiple devices, so both husband and wife can be involved in charting and grow in fertility awareness.
For more than 50 years, thousands of couples have learned NFP with CCL and trusted our algorithms to help them track and interpret their cycles to determine peak fertility. Now, we are using that same highly effective formula and algorithm behind PeakDay. It’s trusted and has a proven success rate for over 10,000 users (previous version known as CycleProGo app.)
10 Ways PeakDay can work for you:
1. Track your cycles. Easy to chart your menstrual cycle and ovulation by simply inputting your symptoms and signs each day.
2. Manage your fertility goals. You can naturally plan your family by using the fertility phase information to achieve pregnancy.
3. Predict the PeakDay of your fertility so that you can make sound fertility decisions.
4. Connect with our fertility community. Participating in the message boards and forums on PeakDay puts you in touch with fertility coaches for guidance and greater knowledge.
5. Share your charts and cycle history with real fertility coaches on the app or even connect your account to a fertility teacher.
6. Easy to use to practice NFP. PeakDay is fully compatible with CCL’s Sympto-Thermal method of Natural Family Planning and is used in both CCL and Liga de Pareja classes.
7. Custom tracking of over 60 fertility symptoms and signs. You can choose what you want to track daily by personalizing the settings.
8. Compare your personal cycle history. To better understand your body and fertility, you can keep cycle history which can help discover patterns in your cycles. The comparing tool allows you to look at 6 months of cycles and see your personal cycle statistics.
9. Learn about women’s health and grow in fertility awareness. Our online learning center is connected to PeakDay with videos explaining the basics about fertility, cycles and how biomarkers like mucus and temperature are important to fertility tracking.
10. Your data is in your hands. PeakDay is password protected and allows you to keep the account private or share your account with a spouse, a fertility expert or even with your doctor.
Looking for a reliable and simple fertility ovulation tracker or health app for women? Download PeakDay today to make that happen. Visit Peakday.com for more information about pricing, subscription options and learning materials.
To learn CCL’s STM NFP method, please visit www.ccli.org. If you are looking for a NFP class in Spanish, visit www.ligadepareja.org For fertility coaching and other programs, visit www.fertilityscienceinstitute.org
If you are having technical issues or have any questions, we are here to support you. [email protected]
For full Privacy Policy and our Terms of Service: https://peakday.com/terms/
Disclaimer: This tool should not be used for medical purposes or as a substitute for medical advice. Actual performance and results are not guaranteed. Use at your own risk.
User reviews
La app esta basada en el metodo sintotermico y tus sintomas personales cada dia lo que la hace altamente efectiva y te da alegria ver el diseño de tu cuerpo no como otras basadas en estandars absurdos que te hacen sentir insegura de tu propia fertilidad. 5 estrellas es exelente
Love the new look and colors. Also easy to use.
This is a great app to track your fertility for all stages of fertility - avoiding, achieving, or just for general health.
As a new user to an app for fertility tracking, PeakDay made it easy to understand, input and interpret my personal information. I love the sharing options and chart analysis.
Great customer service. Helpful. Great tool for knowing your fertility.
Frequently asked questions
What is PeakDay?
PeakDay is a fertility cycle tracker that can be used for period charting or to assist with the practice of natural family planning.
How can PeakDay help determine peak fertility for pregnancy?
To determine peak fertility for pregnancy, you can record your daily fertility signs or symptoms, like basal body temperature and cervical mucus, using PeakDay.
Who uses PeakDay?
Couples who are learning the Sympto-Thermal method of Natural Family Planning (NFP) in CCL and LLP classes use the PeakDay app.
Is PeakDay free to use?
Yes, PeakDay can be used for free by women looking to simply track their period and chart their ovulation cycle.
What does the premium version of PeakDay offer?
The premium version of PeakDay allows women to chart their fertility cycles and log health information to help determine their fertility phase and situation.
Can charts and data be accessed from multiple devices?
Yes, charts and data can be accessed from multiple devices, allowing both husband and wife to be involved in charting and grow in fertility awareness.
How long has PeakDay been trusted by couples?
PeakDay has been trusted by couples for over 50 years, with a proven success rate for over 10,000 users.
What are some ways PeakDay can work for you?
PeakDay can help you track your cycles, manage your fertility goals, predict your peak fertility, connect with a fertility community, share your charts and cycle history, practice NFP, customize your tracking, compare your personal cycle history, learn about women's health, and keep your data private or share it with trusted individuals.
How can I learn the Sympto-Thermal method of NFP?
To learn the Sympto-Thermal method of NFP, you can visit the CCL website at www.ccli.org.
Where can I find NFP classes in Spanish?
If you are looking for NFP classes in Spanish, you can visit the Liga de Pareja website at www.ligadepareja.org.
Alternatives to PeakDay Fertility Tracker
Looking for apps like PeakDay Fertility Tracker? Here are 6 similar Android apps on Google Play. The highest rated is Baby Milestones & Development (4.3/5), and all 6 are free to download.
-
Pregnancy Tracker App - EMA
-
Baby Milestones & Development 4.3
-
Preglife Connect: Mom friends
-
timestic: tracking made easy
-
Every Mother 4.3
-
Tea Time 2.5
| App | Rating | Price | Installs | Last updated |
|---|---|---|---|---|
| PeakDay Fertility Tracker | 3.5 / 5 | Free | 100,000+ | Jun 18, 2026 |
| Pregnancy Tracker App - EMA | – | Free | 5,000+ | Aug 22, 2023 |
| Baby Milestones & Development | 4.3 / 5 | Free | 100+ | – |
| Preglife Connect: Mom friends | – | Free | 500+ | – |
| timestic: tracking made easy | – | Free | 100+ | Sep 17, 2021 |
| Every Mother | 4.3 / 5 | Free | 10,000+ | Sep 18, 2026 |
| Tea Time | 2.5 / 5 | Free | 1,000+ | Sep 4, 2026 |