Natural Cycles: Fertility App

Natural Cycles: Fertility App

Ovulation Tracker・FDA-cleared

30K ratings
1477 reviews
With Ads#28 in top-grossing Health & Fitness
💪 Health & Fitness
🏥 Medical
Free
In-App PurchasesWith Ads

Details

Released
December 17, 2013
Updated
October 15, 2026

Features

Natural Cycles: Fertility App screenshot #1 for iPhone
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About

This app helps women track their hormonal health and fertility using body temperature data. It offers hormone-free contraception, pregnancy planning, and insights into various cycle stages. It adapts to individual cycles, even irregular ones, providing daily fertility status.

✓Hormone-free contraception
✓Ovulation tracking via temperature
✓Personalized cycle adaptation
✓Pregnancy planning and tracking
✓Postpartum and perimenopause modes
✓Mood tracking
✓Data protection
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What users say about Natural Cycles

See all reviews

What's New in Natural Cycles

5.9.4

October 15, 2026

A few polishes for a better experience.

7

Subscriptions & In-App Purchases

Yearly with 7 day trial

Yearly with 7 day trial

$119.991 Year
7 Days trial
How to cancel Natural Cycles subscription ⁉️

Charts

Top Grossing

This app rose +4 positions in Health & Fitness chart.

Last updated on October 27, 2026.

Top Free

This app dropped -2 positions in Health & Fitness chart.

Last updated on October 27, 2026.

Events

Read more about Use WHOOP with Natural Cycles°

Use WHOOP with Natural Cycles°

Wear WHOOP overnight, wake up to NC° insights.

Aug 4, 2026 — Sep 1, 2026

Read more about Meet Sleep Insights

Meet Sleep Insights

Your cycle, your sleep — connected in one place

Jun 16, 2026 — Jul 17, 2026

Read more about Natural Cycles° x Garmin

Natural Cycles° x Garmin

New integration is here.

Mar 31, 2026 — May 1, 2026

User reviews

Not recommended

I would not recommend this app. I have been using it for two months now and I know nothing about my cycle. Fertility friend is much better and it’s free or the paid version is cheaper.

Helpful customer service

Flor in customer service was very very helpful and friendly. The email responses were quick and professional. I would like to try the app but I don’t have a tracking device or the finances at the moment. Flor was very helpful with helping cancel the subscription after the one month free trial ended. Because of Flor’s friendly support I hope to try the app in the future if I continue to have issues with fertility. Highly appreciate the quick responses.
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DONT USE

Hello I hope this reaches you before you make a HUGE mistake. This company sucks. The tracking is in accurate usually by 1-2 days. The band does not accurately record temperatures. Their website clearly says to cancel the subscription do so through apple. THEY WILL CHARGE YOU AGAIN. And when you show them you cancelled the way their own website tells you to all they will do is offer if you “want to come back” you’ll get the year they just charged you for… EVEN IF YOU CANCELLED! They are truly scam artists. Flo is more accurate and 1/2 the price.
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Please remove the evening check in!

It’s really annoying that every time I open the app I have to dismiss a popup either in the morning or evening. Let people opt out of this products and just manually enter their data. It would make using the app a lot less frustrating.

Finally Know My Body

This app has been so amazing learning about my own body. I’m so grateful for it & feel way more in control of my body!!!

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User experience

🐞

Reported Bugs

3 issues

App functionality issues after updates

Bug

Syncing problems between thermometer and app

Bug

Inaccurate pregnancy and ovulation predictions

Bug
✨

Requested Features

6 requests

Add ability to track additional symptoms and cycle data

Feature

Integrate with other health tracking devices and apps

Feature

Improve thermometer design and connectivity

Feature

Provide more personalized cycle predictions and insights

Feature

Enhance app design and user experience

Feature

Offer more flexible subscription options

Feature

FAQ

What does the Natural Cycles app do?

The app uses your body temperature to track ovulation, helping you identify fertile days for preventing or planning pregnancy. It offers a hormone-free contraception method and provides insights into different stages of your reproductive health, including postpartum and perimenopause.

How effective is Natural Cycles for birth control?

The app is scientifically proven to be 93% effective with typical use and 98% effective with perfect use. It's important to note that no birth control method is 100% effective, and it does not protect against STIs.

What are the subscription options and costs?

Natural Cycles requires a subscription to access its core features, with options for monthly and annual plans. Signing up for an annual subscription often includes a free NC° Band. US users may be covered by insurance for their subscription.

What devices can I use to measure my temperature with Natural Cycles?

You can measure your temperature using the NC° Band, an Oura Ring, Apple Watch Series 8 or newer (worn while sleeping), or a compatible Garmin device. The app adapts to your unique cycle, even if it's irregular.

Is my data safe with Natural Cycles?

Yes, advanced data protection is a priority. Unlike many free apps that sell user data for advertising, Natural Cycles' subscription fee helps protect your privacy and keep your data safe.