Best Period Tracker Apps in 2026: 7 Apps Compared

Flo is the biggest name in the category. Its site calls it the world's number one women's health app, and the US App Store listing shows about 4.7 stars from more than two million ratings. It covers period and ovulation prediction, symptom logging, pregnancy and perimenopause, and the Premium page lists extras such as a symptom checker, a health assistant, a library of expert content and a doctor's report.

Privacy needs a straight discussion. In 2021 the FTC finalized an order with Flo Health after alleging the company shared sensitive health data with third parties, including Facebook's and Google's analytics divisions, despite promising to keep it private. Flo now promotes Anonymous Mode, which it says lets you track without your name, email or IP address linked to your health data. That is the company's description, so read the current privacy policy before relying on it.

Pricing varies. The App Store lists several Premium subscription options at different prices, so we show See website. Flo's comparison table does not make clear which features are free, so check in the app before you pay. Choose Flo if you want depth and education, and use Anonymous Mode if privacy matters to you.

Clue is published by BioWink GmbH, and its privacy policy says it processes data under the EU's GDPR, hosts data on Amazon Web Services data centers in the European Union and encrypts everything stored there. Health data processing relies on your consent, and AI-powered insights only run if you choose to activate them. The US App Store listing shows about 4.8 stars from over 400,000 ratings.

The free app handles tracking and predictions. Clue Plus is listed on the App Store at $9.99 a month or $39.99 a year, and adds deeper analysis and advanced predictions according to the Clue site. The site also has sections for trying to conceive, pregnancy, perimenopause and cases where you do not get a period.

The honest catch: the privacy policy names service providers, including Braze, a US company that helps send in-app messages and emails, with safeguards for transfers outside Europe. That is normal for a business, but it means your data is not purely on your phone. Clue suits people who want a polished app with clear GDPR-style disclosures.

Natural Cycles is different from the rest. It calls itself the first and only app cleared by the FDA as birth control and says it works out your fertility status from your own temperature data, instead of assuming a 28-day cycle. The site promotes an overnight NC° Band for measuring, and lists modes for planning pregnancy, following pregnancy, postpartum recovery and perimenopause.

The company reports 98% effectiveness with perfect use and 93% with typical use, which it places in the same category as the pill and above condoms at 87%, citing Contraceptive Technology. That 93% means roughly 7 in 100 typical users could still become pregnant in a year, so the app is not a guarantee. Talk to a clinician before using any method.

The App Store lists a monthly subscription at $21.99 and an annual one at $149.99, and the app is free to download but needs the subscription. It is a good fit if you want a hormone-free method and will measure consistently. If you only want to log periods, it is much more than you need.

Stardust mixes cycle tracking with moon sync, daily horoscopes and tarot readings tied to your cycle phase. Its FAQ says the free version includes accurate cycle predictions, daily insights and symptom tracking, and that premium, called Stardust Super, adds items such as a Daily Decode, personalized horoscopes, a symptom library and Signal Sync for sleep and activity patterns. The App Store shows about 4.8 stars from over 119,000 ratings.

On privacy, the Your Data page says Stardust does not sell data, stores contact information separately through an authentication partner, SuperTokens, and ties health data to a random account ID. The privacy policy was last updated May 8, 2026. The App Store lists Super at $6.99 a month or $29.99 a year.

Stardust is a good pick for people who like the fun, personal style and want a free base. If the astrology angle feels like noise, skip it for a plainer tracker.

Euki describes itself as the period tracker that does not track you. It is an open-source project managed by an independent 501(c)3 nonprofit, it is free to use, and the site says it never collects personal data, so there is nothing to sell or use for advertising. It is available in English and Spanish and includes sexual and reproductive health resources, and the site cites favorable reviews from Mozilla's Privacy Not Included and WIRED.

The privacy design has real costs. Euki's FAQ says tracked data lives only on your device. If you forget your PIN you have to reinstall and start from scratch, and if you lose or change phones there is no cloud download, only manual re-entry for now, although the team says it is working on a transfer option.

The US App Store rating is about 4.2 from only 161 ratings, a small base, so do not read much into that number. Euki is the right choice for anyone whose main concern is privacy and who is happy to trade away backups for it.

Cycle Tracking sits inside the Health app on iPhone, iPad and Apple Watch. Apple says you can log your period and symptoms, get predictions for your next period or fertile window, and receive notifications if your logged history suggests a cycle deviation, such as irregular or prolonged periods. With Apple Watch's sleeping wrist temperature, it can also give retrospective estimates of when you likely ovulated.

Apple's health privacy statement says data is encrypted on the device and accessible only with your passcode, Touch ID or Face ID. Data synced to iCloud is encrypted in transit and at rest, and with the default two-factor authentication it is end-to-end encrypted, so Apple cannot read it. There are also pregnancy features that show gestational age in Cycle Tracking.

There is no subscription, and nothing to install. The limits are the platform and the depth: Android users cannot use it, and it lacks the article libraries that apps such as Flo or Clue provide.

drip is published by Heart of Code e.V., a German registered association according to its App Store listing, and describes itself as a secure, open-source cycle tracking app. Its site says everything you enter stays on your device and that its calculations are transparent, and it is designed with gender inclusivity in mind. You can track only your period or use the symptothermal method to detect fertility.

It is available on Google Play, and the site also offers an Android APK for people who prefer not to use the Play Store. An iOS version exists too, with a US App Store rating of about 4.0 from just 59 ratings, so the user base is small. A local-only design means you should check how to export or back up your data.

drip suits people who want the lightest footprint and the most transparency. If you want content libraries, charts and a polished look, one of the larger apps will feel more complete.