For US customers only: Natural Cycles is only certified for birth control in Europe. In the US, Natural Cycles is intended to be used for fertility monitoring.

Natural Cycles is the only certified birth control app in Europe and so much more. It's the app that gives you the knowledge to get to know your body and truly understand how your cycle works.

Backed by clinical research it has been shown to be 99% effective in perfect use and 93% effective in typical use.*

The app is subscription based, see below for pricing plan details.

More than 700.000 women are using Natural Cycles, join them and get to know:
○ How your unique cycle works
○ When you are not fertile
○ When your period is coming up and you can expect PMS
○ When your ovulation is detected and predicted
○ When you are at risk of getting pregnant and need to use protection (e.g. condoms)

More great things about Natural Cycles:
○ The only certified app for contraception in Europe
○ Backed by clinical research
○ Teaches you the science behind your menstrual cycle along the way

Natural Cycles Pricing Plans:
To use the app you will need a two-decimal basal thermometer. Go ahead and sign up for our annual subscription for 79.99USD and we will ship a thermometer right to your doorstep free of charge. With this plan you will be charged in full, once per year.

Sign up to our Monthly subscription and pay 9.99USD on a monthly basis. You can also try out our Free trial version for one month. Both of these options do not include the Natural Cycles thermometer.

○ You must be over 18 years old to use Natural Cycles
○ Natural Cycles does not protect against sexually transmitted infections (STIs) in any way.
○ Natural Cycles informs you whether and when you can become pregnant. Abstention or protection (e.g. condoms) are required on red days to prevent pregnancies.
○ As a birth control, Natural Cycles may be less suitable if you experience irregular menstrual cycles as predicting your fertile days becomes more difficult and you will get an increased number of red days. For birth control, it is ideally used by women with fairly regular and ovulatory menstrual cycles.

Want to learn more about Natural Cycles? Visit:

To use Natural Cycles, you need to understand English or one of the supported languages.

* E. Berglund Scherwitzl et al. Perfect-use and typical-use Pearl Index of a contraceptive mobile app. Read more here:

What's New

Version 3.0.9

Natural Cycles has updated the entire app to increase performance and make the app more snappy, giving you a better user experience. We have also included some new improvements based on your feedback!
+ You can now add data offline and the app will store it for you until the next time you are online. The app will then sync the new data with the algorithm and return your updated fertility status.
+ Free trial users and users that are still taking hormonal contraception will be able to take a demo tour of the app with simulated data until they are ready to start their personal experience.
+ We’ve added a separate setting to make it easier for you to switch manually to our ‘pregnancy mode’ or to sign up as already pregnant within the app.
+ We’ve improved our notifications. You can now choose what time you’d like to receive reminders to measure.
+ IPhoneX compatible design

Ratings and Reviews

4.8 out of 5

1.7K Ratings

1.7K Ratings

Editors’ Notes

Understanding the complexities of ovulation cycles is hard enough. Thankfully, Natural Cycles aims to make the monitoring process a whole lot less stressful. By logging just a few vital signs, the app’s powerful algorithm can help predict crucial fertility windows, pregnancy, or even potential miscarriages. We’re also impressed by Natural Cycles’ clear, intuitive design—no cold waiting rooms to be found here.

I love this form of birth control! It’s liberating and easy and accurate!


I am 24 and have been on and off birth control since I was 18. I’ve never really liked the idea of being on long term (or short term honestly) hormonal birth controls. I tried a copper iud but my uterus rejected it 🙄 I was so close to getting an implant because I was getting pretty bad at taking my pill but then I heard about this app. I talked with my partner about how he felt about doing this and he said “if I was a girl I would use this! It sounds a lot safer than using pills or something permanent.” And that was all I needed to get off the pill. We’ve been using this app for 4 months now and I work night shift so as long as I sleep for 4 hours I can take an accurate temperature. He can also download the app so he can see my green and red days to see when we need to be more careful. I feel great using this too because when we start trying to get pregnant (3 years away but still) I won’t have to detox my body from the pill or go to the doctor to get anything removed or anything. It does take discipline to take your temp every morning but it’s worth it and easy if you have a routine. I use a sleep app called sleep cycle to make sure I’ve gotten enough hours to take a temp so that’s part of my routine ☺️

Education is power


I’m 32 and was on and off birth control for 15 years. I’ve had fibroadenomas (lumps) removed from my breasts. I suffered from sore breasts a week before my period. It took me a while to get aroused... But being OFF birth control has made all those symptoms disappear. Synthetic hormones are a huge (and dangerous) chemical disruption to your entire system.
I love Natural Cycles. I love knowing my body better. I love NOT having sore breasts before my period. I think if we could educated women about how our bodies work (with the help from Natural Cycles), then more women would ditch their birth control and actually be able to know when their ovulating.
I actually didn’t know anything about ovulation until I started using this app. I’ve also been using the PH strips and I feel extremely satisfied with this app. I’ve had sex, with protection, and knew if I was ovulating or not. That’s a strong sense of awareness.
Rather than ‘popping a pill,’ get to your know your body and let your hormones do what they were meant to do! I just love Natural Cycles and have referred it to many of my friends. The world needs more people like the ones who invented Natural Cycles!


NaturalCycles Nordic AB
20.2 MB
Health & Fitness
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 12+ for the following:
Infrequent/Mild Sexual Content and Nudity
Infrequent/Mild Medical/Treatment Information
© NaturalCycles Nordic AB
In-App Purchases
  1. Natural Cycles monthly plan $9.99
  2. Natural Cycles yearly plan $79.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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