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Is Natural Cycles° right for you?

How it works

Choose a device

Use our free thermometer when you sign up. Or sync our app with your Apple Watch or Oura Ring.

Take your temperature

Use your chosen device to take your temperature right when you wake up.

Open the Natural Cycles app

The app shows you your fertility status, cycle trends, and helpful insights.

NC Devices
Measure with NC
Holding NC App
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How effective are other forms of birth control?

NON-HORMONAL


Natural Cycles°

Natural Cycles App

93%

Copper IUD

Copper IUD

99%

Condom

Condom

87%

HORMONAL


Hormonal IUD

Hormonal IUD

99%

Vaginal Ring

Vaginal Ring

93%

Contraceptive Pill

Contraceptive pills

93%

Natural Cycles

Backed by science, the Natural Cycles° algorithm is powered by your body temperature.

Inside the app

unlock

Unlock

Our FDA Cleared algorithm uses your temperature to identify fertile and non-fertile days.

trackers

Track

Log mood, energy, and more to see how your cycle impacts you.

ovulation prediction

Learn

Customized insights and expert content to help you understand your unique experience.

Hear directly from Cyclers like you

4.8

40K+ ratings in the App Store

Michelle

Michele

I feel empowered knowing about my body’s natural processes.

NC° Birth Control

Bethany

Bethany

I’ve experienced significantly less pelvic pain... and our intimacy couldn’t be better.

NC° Birth Control

Dr. Katara

Dr. Katara

Has got to be THE best natural birth control on the market. 10/10 recommend!

NC° Birth Control

Shadow

Shadow

NC° helped me understand my body, cycle, and the best time of the month to get pregnant.

NC° Plan Pregnancy

Katie

Katie and her family

Nothing short of amazing! We just welcomed our baby girl thanks to NC° 🥰

NC° Plan Pregnancy

Join Our Community

#NaturalCycles

BIG Congratulations for Deena 🥹🫂⁠
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Still can’t believe it 😭😭 ⁠
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After so much hoping, month after month.⁠
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I was a little nervous to share this, because personally there have been so many times where I’ve seen someone else’s news and burst into tears. TTC is such an emotional rollercoaster. Your messages over the last year brought me so much hope + encouragement when things felt confusing, frustrating and sad. And to those on the rollercoaster right now, sending you so, so much love.⁠
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If you’ve been following my journey, you know I’ve been navigating endometriosis and adenomyosis for over 2 years now. I worked hard to lower my inflammation levels, and in this last TTC cycle, we tried something new with our medical team: Every morning, I recorded my temperature in my @naturalcycles app, and the app was able to analyze fluctuations in my body temperature to give me personalized insights into my cycle and to determine my fertility window. My doctor used the ovulation day noted by my app to time a trigger shot (a shot that boosts chances of conception) and then we… gave it a go!🤭😜🫣 (I’m going to be honest, we were both so tired that night and a little grumpy but somehow managed to😂 you know we keep it real here at BLF). And it… worked?!?!⁠
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Currently around 9 weeks, and feeling sick every day but so grateful and excited to eventually meet this next baby🥹⁠
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I share all of this with you because this journey is not easy, and I feel so lucky that we now have tools that can help us in this process. I could not love this app more (I’ve been using it since 2018 and it’s been so helpful both in my first two pregnancies and in my endo/adenomyosis journey).⁠
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✨: @biglittlefeelingswelp! Glad that's changed 😅🐸However, everyone is different, and research shows that vaginas vary between two to five inches deep 📏 There are several things that can influence the depth of your vagina, such as hormonal changes at menopause, and giving birth. While there is often concern around changes to the vagina after childbirth most of the stretching that happens is temporary, and most vaginas will return to the same size (or a similar size) as they were pre-childbirth 🤸⁠
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Just like other parts of our bodies, our sexual organs can vary in size and appearance, and the size of your vagina shouldn’t have an impact on your life. However, if you have questions or concerns, you can always talk to your doctor or gynecologist to learn more 🧑‍⚕️The need for accessible educational resources is more urgent than ever. A recent BPAS survey revealed that nearly half of UK women face significant barriers to accessing contraception, including long wait times for appointments 😞 Follow the link in our bio to learn more about what we are doing to address these challenges 💪🔗⁠

Common questions

You must be over the age of 18.Does not protect against STIs.

FDA Cleared

Natural Cycles is 93% effective with typical use, 98% effective with perfect use. No method of contraception is 100% effective. Natural Cycles does not guarantee that you cannot get pregnant, it only informs you whether and when you can become pregnant based on the information that you enter into the application.