Natural Cycles: Fertility App5.9.3

Natural Cycles is a 100% non-hormonal birth control app cleared by FDA. Get an NC° Band with our annual subscription, or a compatible wearable to measure your basal temperature and track your biomarkers. Trusted by 6M+ women, using Natural Cycles as an ovulation tracker is a great way to start your birth control or fertility journey.

Trust in science to support you
. Natural Cycles is 98% effective when used as intended, and 93% with typical use.
. Typical use is in the same effectiveness category as the contraceptive pill, which is 93% effective.
. Unlike period trackers, our algorithm uses personalized temperature trends data to detect ovulation.

Naturally prevent pregnancy
. NC° Birth Control is a non-hormonal contraception with no side effects.
. Our algorithm updates your fertility and ovulation status daily based on your temperature, showing not-fertile days, or days to use protection.

Organic pregnancy planning
. NC° Plan Pregnancy measures your body temperature to track ovulation when trying to conceive.
. Powered by biometrics, our algorithm pinpoints ovulation and peak fertility - you can try when it matters.
. NC° partner view lets you choose to allow your partner to follow your pregnancy planning journey.
Monitor your pregnancy
. NC° Follow Pregnancy helps you monitor your baby’s developmental stages.
. Get tailored guidance, tracking baby movements, morning sickness, and other symptoms.

Get postpartum support
. NC° Postpartum supports you after pregnancy with daily check-ins, tracking symptoms, post-partum bleeding and providing articles with expert guidance.
. Use temperature to know when ovulation returns post-pregnancy.

Track perimenopause symptoms
. NC° Perimenopause measures your temperature to track hormonal changes and symptoms until post-menopause.

Gain sleep insights
. See how and why your sleep changes across your cycle with Sleep Insights.

Choose your measuring device
.Natural Cycles is an ovulation tracker that can be used with the NC° Band, basal thermometer, Oura Ring, WHOOP, compatible Garmin devices or Apple Watch Series 8 or newer.
. Easily measure your temperature to track your fertility, using your choice of compatible wearable.
. Sign up to NC° Annual subscription and receive a free NC° Band.

More than a period tracker
. The NC° app adapts to your unique cycle, tracking fertility and ovulation even with irregular periods.
. Most period trackers assume you have a 28-day cycle, when most women don’t. We give you tailor-made guidance based on your menstrual cycle.

Subscription service
. Subscribe to our monthly or annual plan to unlock core features.
. Subscriptions are FSA/HSA eligible for reimbursement.

Every Natural Cycles subscription includes our advanced data protection program. Some free period tracking apps don’t have the same level of accountability. Your privacy is a priority. Natural Cycles is designed to keep your data safe.

The NC° app is more than just a period tracker, use it as a birth control, or to plan pregnancy with our ovulation tracker and daily fertility updates. Join 6 Million+ women who trust Natural Cycles.

Natural Cycles connects with Apple Health to read and write your health data, including medications, body temperature and cycle information.

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Precautions
. Natural Cycles does not protect against sexually transmitted infections (STIs). Use a condom to protect against STIs.
. No method of birth control is 100% effective. Even when using the birth control app perfectly, there is still a chance of pregnancy.
. Natural Cycles is for women 18 and older.
. Natural Cycles is authorized for use as birth control in the US, Canada, the UK, the EU/EEA, Australia, Singapore, Brazil, and South Korea. Outside these regions, the app is intended for fertility monitoring only.
. To use Natural Cycles, you need to understand English or one of the supported languages.
. Consult with a doctor before making any medical decisions.

Version History A few polishes for a better experience. 5.9.3 14h ago We've been busy working under the hood. Our latest update ensures our technical health stays strong so you can enjoy a seamless experience. 5.9.1 Sep 29 We have polished the app for an even smoother experience. 5.9.0 Sep 11 This update includes a few tweaks for an improved app experience. 5.8.4 Aug 18 We've been busy working under the hood. Our latest update ensures our technical health stays strong so you can enjoy a seamless experience. 5.8.3 Aug 4 We've been busy working under the hood. Our latest update ensures our technical health stays strong so you can enjoy a seamless experience. 5.8.2 Jul 22 A few polishes for a better experience. 5.8.1 Jul 7 Our latest update freshens up the app for you! 5.8.0 Jun 29 This update includes a few tweaks for an improved app experience. 5.7.7 Jun 10 We have polished the app for an even smoother experience. 5.7.6 May 27 This new update brings you small changes to make your Cycling experience even better! 5.7.5 May 12 A few polishes for a better experience. 5.7.4 Apr 30 We've been busy working under the hood. Our latest update ensures our technical health stays strong so you can enjoy a seamless experience. 5.7.3 Apr 23 This update includes a few tweaks for an improved app experience. 5.7.2 Mar 31 An updated app with small tweaks, just for you! 5.7.1 Mar 18 This update includes a polish for an improved experience. 5.7.0 Mar 9 Cycle smoother than ever with this updated version of the app! 5.6.11 Feb 17 Cycle smoother than ever with this updated version of the app! 5.6.10 Feb 3 An updated app with small tweaks, just for you! 5.6.9 Jan 21 Cycle smoother than ever with this updated version of the app! 5.6.8 Jan 8 This version includes small tweaks for an even better Cycling experience. 5.6.7 12/16/2025 An updated app with small tweaks, just for you! 5.6.6 12/10/2025 Our latest update freshens up the app for you! 5.6.5 11/25/2025 This update includes a few tweaks for an improved app experience. 5.6.4 11/12/2025 An updated app with small tweaks, just for you! 5.6.3 10/29/2025