Track your fertility overnight
NC° Birth Control powered by Oura Ring
Now measure your temperature trends overnight with Oura Ring and wake up to your daily fertility status.
Natural Cycles is the only FDA Cleared birth control app that uses body temperature to prevent and plan for pregnancy naturally.
How does Natural Cycles compare to other methods?
HORMONAL
HORMONAL
93%
Contraceptive Pill
93%
Vaginal Ring
99%
Hormonal IUD
NON-HORMONAL
93%
Natural Cycles°
87%
Condom
99%
Copper IUD
NON-HORMONAL
Percentage of typical users who did not get pregnant with the method over 1 year of use. Read more.
How does the NC° algorithm work?
You can only get pregnant 6 days each cycle. The algorithm behind the NC° app uses body temperature to find these days.
The algorithm learns the pattern of your cycle, giving a daily fertility status, so you can prevent pregnancy hormone-free!
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Prevent or plan pregnancy, naturally
Gain insights to help you to make informed choices about your fertility — all in one app
NC° Birth Control
Natural Cycles is the only FDA-cleared and CE marked birth control app. The app finds your fertile window by analyzing hormone-driven temperature changes, so you know which days you are fertile and not fertile.
NC° Plan Pregnancy
Find fertile days and conceive faster. Research shows that couples using Natural Cycles get pregnant in 3 cycles on average — that’s the power of knowing your cycle.
Source: Berglund Scherwitzl, E. et al. (2019), Short- and long-term effect of contraceptive methods on fecundity, Eur J Contracep Repr
NC° Partner View
With NC° Partner View you can share your fertility insights with your partner — because birth control should be a shared responsibility. If you’re using NC° Plan Pregnancy, your partner can also follow your predicted ovulation.
Frequently asked 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.