Natural Cycles: Fertility App

Natural Cycles: Fertility App

Ovulation Tracker・FDA-cleared

30K ratings
1466 reviews
With Ads#24 in top-grossing Health & Fitness
💪 Health & Fitness
🏥 Medical
Free
In-App PurchasesWith Ads

Details

Released
December 17, 2013
Updated
October 15, 2026

Features

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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 +1 position in Health & Fitness chart.

Last updated on October 26, 2026.

Top Free

📉 116-1

Health & Fitness

This app dropped -1 position in Health & Fitness chart.

Last updated on October 26, 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

Heads up no free version

I went through account creation in the app there is no free version

This + Oura = perfection

This and the Oura ring go crazy for bc option

App funktioniert wieder

Die App funktioniert nach einer Woche nach dem Update wieder. Die Temperaturen wurden vom NC Band übernommen, obwohl die App eine Woche nicht funktioniert hat. Der Kundenservice war sehr bemüht und auch sehr freundlich. Ich nutze die App sehr gerne zusammen mit den Ovulation Test Kits.

Stop Changing My Ovulation Date

Really frustrating that the app changes the date of my ovulation depending on when my period starts because of antiquated understanding that the luteal phase must be a certain length. Let the data speak for itself, do not change the data to fit a narrative.

Also very misleading in that the app makes you believe you can track ovulation with temperature alone. You also need to be tracking at least cervical fluid or cervical position as well. There have been times when it says I’m not fertile but I still have very clear ovulatory cervical fluid indicating otherwise. Do better.
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Great app!

I’ve really been enjoying using Natural Cycles and it’s such a great level of reassurance. I feel like one thing that would make the app better is if it gave us personal insights on things to do more or less of on our period. Foods that can help us in different cycles and recommended exercises and routines to help get in tune with our 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.