The official app of Taking Charge of Your Fertility
The official app of Taking Charge of Your Fertility
The official app of Taking Charge of Your Fertility
By Toni Weschler, MPH
By Toni Weschler, MPH
By Toni Weschler, MPH
By Toni Weschler, MPH











Carefully crafted by Toni Weschler, MPH—renowned FAM expert and author of the best-selling book Taking Charge of Your Fertility—alongside a passionate team of designers, developers and physicians, the goal of Cyclisity is simple: be the world's best symptothermal method tracking app.
Integrating seamlessly with the 2015 edition of Taking Charge of Your Fertility, Cyclisity follows TCOYF's science-based guidelines to help you confidently track your ovulatory cycles.
Because a strong knowledge-base is crucial to practicing FAM correctly, in-app references can guide you back to key educational concepts from the book, ensuring you have ample support on your fertility awareness journey.
Carefully crafted by Toni Weschler, MPH—renowned FAM expert and author of the best-selling book Taking Charge of Your Fertility—alongside a passionate team of designers, developers and physicians, the goal of Cyclisity is simple: be the world's best symptothermal method tracking app.
Integrating seamlessly with the 2015 edition of Taking Charge of Your Fertility, Cyclisity follows TCOYF's science-based guidelines to help you confidently track your ovulatory cycles.
Because a strong knowledge-base is crucial to practicing FAM correctly, in-app references can guide you back to key educational concepts from the book, ensuring you have ample support on your fertility awareness journey.
Carefully crafted by Toni Weschler, MPH—renowned FAM expert and author of the best-selling book Taking Charge of Your Fertility—alongside a passionate team of designers, developers and physicians, the goal of Cyclisity is simple: be the world's best symptothermal method tracking app.
Integrating seamlessly with the 2015 edition of Taking Charge of Your Fertility, Cyclisity follows TCOYF's science-based guidelines to help you confidently track your ovulatory cycles.
Because a strong knowledge-base is crucial to practicing FAM correctly, in-app references can guide you back to key educational concepts from the book, ensuring you have ample support on your fertility awareness journey.
Your privacy is our policy
Your privacy is
our policy
Your privacy is our policy
At Cyclisity, we guarantee you remain the exclusive owner of your data. Rest assured, we will never sell your data, and will never forward it to a third party unless instructed by you.
At Cyclisity, we guarantee you remain the exclusive owner of your data. Rest assured, we will never sell your data, and will never forward it to a third party unless instructed by you.
At Cyclisity, we guarantee you remain the exclusive owner of your data. Rest assured, we will never sell your data, and will never forward it to a third party unless instructed by you.

Meet the team
Meet the team
Meet the team

Toni Weschler, MPH
Co-founder,
Senior Advisor
Toni Weschler, MPH, author of Taking Charge of Your Fertility, provides expert guidance as we bring FAM, TCOYF, and technology together.

Sabrina Nowicki
Co-founder,
CEO
Sabrina founded Cyclisity with an engineering and product design background, bringing the technical expertise and user-centered thinking critical to our mission.

Max Nowicki, MD
Co-founder,
COO & CFO
Max guides our business and financial strategy, having previously trained as a physician, investment banker and biotech venture capitalist.
Why we built Cyclisity
Why we built Cyclisity
Why we built Cyclisity
For years, Toni had a special tradition with her niece, Sabrina. Each year on the anniversary of Sabrina’s first period, they’d go out for dinner to celebrate her journey into womanhood. It was a time for connection, reflection, and deep conversations about the power of understanding one’s body.
For years, Toni had a special tradition with her niece, Sabrina. Each year on the anniversary of Sabrina’s first period, they’d go out for dinner to celebrate her journey into womanhood. It was a time for connection, reflection, and deep conversations about the power of understanding one’s body.
For years, Toni had a special tradition with her niece, Sabrina. Each year on the anniversary of Sabrina’s first period, they’d go out for dinner to celebrate her journey into womanhood. It was a time for connection, reflection, and deep conversations about the power of understanding one’s body.
On the 18th anniversary of Sabrina’s first period, their conversation took a new turn. As they reminisced about the importance of fertility awareness, Toni shared a dream she had carried for years—a vision of creating an app that could seamlessly accompany her book Taking Charge of Your Fertility. She knew that while TCOYF had empowered many women, the traditional method of tracking cycles with pen and paper felt outdated in a world of smartphones.
There was already an abundance of cycle-tracking apps on the market, some of which had even received input from Toni previously. However, no one app was both focused on the symptothermal method approach to FAM, while also closely tied to a ready-made knowledge-base like Taking Charge of Your Fertility. Proper education is critical to practicing FAM correctly, and risks of "garbage-in, garbage-out" with apps in particular was always on Toni's mind. Wouldn't an app that perfectly recapitulated the approach in TCOYF, while also having references back to the book at key points, function as a great symbiosis? Better charting with the app would lead to more knowledge from the book, which would lead to better charting with the app, and so on in a virtuous cycle.
On the 18th anniversary of Sabrina’s first period, their conversation took a new turn. As they reminisced about the importance of fertility awareness, Toni shared a dream she had carried for years—a vision of creating an app that could seamlessly accompany her book Taking Charge of Your Fertility. She knew that while TCOYF had empowered many women, the traditional method of tracking cycles with pen and paper felt outdated in a world of smartphones.
There was already an abundance of cycle-tracking apps on the market, some of which had even received input from Toni previously. However, no one app was both focused on the symptothermal method approach to FAM, while also closely tied to a ready-made knowledge-base like Taking Charge of Your Fertility. Proper education is critical to practicing FAM correctly, and risks of "garbage-in, garbage-out" with apps in particular was always on Toni's mind. Wouldn't an app that perfectly recapitulated the approach in TCOYF, while also having references back to the book at key points, function as a great symbiosis? Better charting with the app would lead to more knowledge from the book, which would lead to better charting with the app, and so on in a virtuous cycle.
On the 18th anniversary of Sabrina’s first period, their conversation took a new turn. As they reminisced about the importance of fertility awareness, Toni shared a dream she had carried for years—a vision of creating an app that could seamlessly accompany her book Taking Charge of Your Fertility. She knew that while TCOYF had empowered many women, the traditional method of tracking cycles with pen and paper felt outdated in a world of smartphones.
There was already an abundance of cycle-tracking apps on the market, some of which had even received input from Toni previously. However, no one app was both focused on the symptothermal method approach to FAM, while also closely tied to a ready-made knowledge-base like Taking Charge of Your Fertility. Proper education is critical to practicing FAM correctly, and risks of "garbage-in, garbage-out" with apps in particular was always on Toni's mind. Wouldn't an app that perfectly recapitulated the approach in TCOYF, while also having references back to the book at key points, function as a great symbiosis? Better charting with the app would lead to more knowledge from the book, which would lead to better charting with the app, and so on in a virtuous cycle.




That night, Sabrina couldn’t stop thinking about Toni’s vision. As a product designer with software engineering experience, she knew she had the skills to help make it happen. When she shared the idea with her husband, Max—an ex-venture capital investor with a medical degree—he immediately recognized the impact such an app could have. Together, they realized they had the perfect team to bring Toni's long-awaited dream to life.
That night, Sabrina couldn’t stop thinking about Toni’s vision. As a product designer with software engineering experience, she knew she had the skills to help make it happen. When she shared the idea with her husband, Max—an ex-venture capital investor with a medical degree—he immediately recognized the impact such an app could have. Together, they realized they had the perfect team to bring Toni's long-awaited dream to life.
That night, Sabrina couldn’t stop thinking about Toni’s vision. As a product designer with software engineering experience, she knew she had the skills to help make it happen. When she shared the idea with her husband, Max—an ex-venture capital investor with a medical degree—he immediately recognized the impact such an app could have. Together, they realized they had the perfect team to bring Toni's long-awaited dream to life.
From the first sketches onward, Cyclisity was born out of passion, expertise, and an unshakable belief in the power of fertility awareness. We believe fertility awareness isn’t about predictive algorithms or a calendar guess, it's about understanding your body’s real-time signals. These signals can shift due to late nights, travel, stress, or countless other factors, and proper education is required to interpret the nuances. The symptothermal approach, rooted in daily observations of waking temperatures, cervical fluid, and cervical position, provides the accuracy and confidence women deserve, while TCOYF serves as a ready-made knowledge base. Now, women everywhere can track their cycles knowing that they, not a predictive algorithm, are in charge of their fertility.
From the first sketches onward, Cyclisity was born out of passion, expertise, and an unshakable belief in the power of fertility awareness. We believe fertility awareness isn’t about predictive algorithms or a calendar guess, it's about understanding your body’s real-time signals. These signals can shift due to late nights, travel, stress, or countless other factors, and proper education is required to interpret the nuances. The symptothermal approach, rooted in daily observations of waking temperatures, cervical fluid, and cervical position, provides the accuracy and confidence women deserve, while TCOYF serves as a ready-made knowledge base. Now, women everywhere can track their cycles knowing that they, not a predictive algorithm, are in charge of their fertility.
From the first sketches onward, Cyclisity was born out of passion, expertise, and an unshakable belief in the power of fertility awareness. We believe fertility awareness isn’t about predictive algorithms or a calendar guess, it's about understanding your body’s real-time signals. These signals can shift due to late nights, travel, stress, or countless other factors, and proper education is required to interpret the nuances. The symptothermal approach, rooted in daily observations of waking temperatures, cervical fluid, and cervical position, provides the accuracy and confidence women deserve, while TCOYF serves as a ready-made knowledge base. Now, women everywhere can track their cycles knowing that they, not a predictive algorithm, are in charge of their fertility.
Start your journey today
Start your journey today
Start your journey today
Join thousands of women who are taking control of their reproductive health. Download Cyclisity now and start tracking your cycles.
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A comprehensive fertility awareness method app designed to help women understand their bodies better.

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