Best Free Period Tracking App in 2026: 7 Apps Compared
Find the best free period tracking app for you. We compared 7 free period and cycle trackers on privacy, predictions, ovulation tools and what the free plan covers.
- Editor's choice
ClueMost people who want a reliable free tracker
Starts atFreeVisit helloclue.comFull review - Great alternative
FloDetailed insights and pregnancy tracking
Starts atFreeVisit flo.healthFull review - Also consider
Apple Health Cycle TrackingiPhone and Apple Watch owners
Starts atFreeVisit apple.comFull review
TL;DR:
- Clue is our pick for most people: the core tracker is free, it holds a 4.8 rating from about 406,000 App Store reviews, and it says it has never sold health data.
- Euki and drip are the most private options. Both show "Data Not Collected" on their App Store privacy labels, and drip says your data stays on your phone by default.
- Flo is the most popular app on the list, but it settled with the FTC in 2021 over sharing health data with Facebook and Google; it now offers an Anonymous Mode.
- iPhone and Galaxy Watch owners already have a free tracker: Apple's Cycle Tracking lives in the Health app, and Samsung Health uses skin temperature from a Galaxy Watch or Ring.
- None of these free apps is approved as birth control. Natural Cycles calls itself the only FDA-cleared birth control app, and it requires a paid subscription.
Quick comparison
| Tool | Best for | Starts at | Free plan? | |
|---|---|---|---|---|
| Clue | Most people who want a reliable free tracker | Free | Yes | Visit |
| Flo | Detailed insights and pregnancy tracking | Free | Yes | Visit |
| Apple Health Cycle Tracking | iPhone and Apple Watch owners | Free | Yes | Visit |
 Euki | Maximum privacy with no data collection | Free | Yes | Visit |
 drip. | Open-source tracking with data on your phone | Free | Yes | Visit |
 Stardust | Friends, partners and moon-phase fans | Free | Yes | Visit |
 Samsung Health | Galaxy Watch and Galaxy Ring owners | Free | Yes | Visit |
The best free period tracking apps
Every app below lets you log periods and get predictions without paying. Several also sell premium tiers, so we note exactly what the free version covers and where the paywall starts.
This article is general information, not medical advice. Talk to a doctor or nurse about irregular cycles, severe pain or fertility questions, and do not rely on a period tracker as birth control.
Clue is the period tracker we would recommend to a friend who just wants something clean, accurate and private. The free account covers period tracking, essential cycle statistics, and a No Period mode for people on hormonal birth control who still want to log symptoms. The app holds a 4.8 rating from about 406,000 ratings on the US App Store.
Privacy is a big part of Clue's pitch. The company, based in Germany, says it has never sold and will never sell your health data or share it with any authority, and that your data is protected by EU privacy law wherever you live.
The paywall sits around the extra modes. Conceive, Pregnancy and Perimenopause tracking require Clue Plus, which the App Store lists at $9.99 and $39.99 as in-app purchases. Clue also states that it is not meant to be used for contraception.
- Free period tracking and essential cycle stats
- Says it has never sold health data
- Mode for tracking without a period
- Pregnancy, perimenopause and Conceive modes need Clue Plus
- Not intended for contraception
Flo is the biggest name here. The company says over 420 million people have used the app, and it holds a 4.7 rating from about 2 million App Store ratings. It covers periods, ovulation, pregnancy week by week and perimenopause, with articles reviewed by its medical team.
There is an honest privacy history to mention. In 2021 the FTC finalized an order against Flo Health after alleging it shared users' health information with marketing and analytics firms including Facebook and Google. Flo says it removed that analytics tool and now holds ISO 27001 and ISO 27701 certifications. Its Anonymous Mode lets you use the app without your name, email or IP address linked to your health data.
The free version handles basic tracking, but Flo leans hard on its Premium subscription, which the App Store lists at several price points. If you choose Flo, turn on Anonymous Mode during setup.
- Very polished app with a large health library
- Anonymous Mode separates your identity from your data
- Partner sharing and perimenopause support
- 2021 FTC settlement over sharing health data
- Many features are pushed toward Premium
If you have an iPhone, you already own a free period tracker. Cycle Tracking in the Health app lets you log your period and symptoms, predicts your next period and fertile window, and can flag possible cycle deviations. Apple says it can also suggest when you may be entering perimenopause.
Privacy is the strong point. Apple says Health data is encrypted on your device and, with two-factor authentication on, encrypted end-to-end in iCloud so that not even Apple can access it.
The limits are simpler insights and hardware requirements. Apple's fertile window uses a calendar method by default, and wrist-temperature ovulation estimates need an Apple Watch Series 8 or later or any Apple Watch Ultra, in supported regions.
- Built into iPhone with nothing extra to install
- Health data encrypted on device and end-to-end in iCloud with two-factor authentication
- Retrospective ovulation estimates on newer Apple Watches
- Fewer insights and articles than dedicated apps
- Ovulation estimates need Apple Watch Series 8 or later
Euki is a period and pregnancy tracker made for people who want as little digital trail as possible. It is open source and run by an independent 501(c)(3) nonprofit, and its site says it is 100% free with no third-party tracking.
The privacy tools are practical. You can set an optional PIN that is not tied to your email or phone number, delete data on the spot, or schedule sweeps that remove sensitive information from your phone. Its App Store listing carries a "Data Not Collected" label. Euki also includes vetted information on contraception and sexual health, plus appointment and medication reminders, in English and Spanish.
The trade-off is polish. Euki has far fewer reviews than Clue or Flo (162 on the US App Store at a 4.2 rating), and its predictions are simpler. For many people, that is a fair price for privacy.
- 100% free with no paywalls
- App Store label says Data Not Collected
- Optional PIN and scheduled data sweeps
- Basic predictions and design
- Small number of App Store ratings
drip. is a small open-source cycle tracker built around transparency. Its site says everything you enter stays on your device, its source code is public, and its App Store listing shows "Data Not Collected." It is free, and the team describes the project as mostly unpaid volunteer work supported by donations and public grants.
It suits people who want more than a calendar. drip. lets you track temperature and cervical signs and use the symptothermal method to read fertility signals, if you choose to turn that on.
The weakness is size. With 59 ratings on the US App Store, it lacks the content library and polish of bigger apps. If your phone is lost or reset, you need your own backup, because there is no cloud account holding your history.
- Data stays on your device by default
- Optional symptothermal fertility tracking
- Available on F-Droid as well as Google Play and the App Store
- Small volunteer team
- Plain interface with few extras
Stardust takes a lighter, more social approach. Its FAQ confirms that the free version includes cycle predictions, daily insights and symptom tracking, and that the app is on both iOS and Android.
The standout feature is Friend Sync. You can connect with a partner or friends using a cycle code and remove or block anyone at any time. The app also syncs your cycle with moon phases, which some users find fun and others will ignore.
Its premium tier, Stardust Super, adds things like daily horoscopes and tarot rather than core tracking, so the free version is complete for most people. Its public pages say "your data is private" but give fewer technical details than Apple or Flo, so read its health data privacy policy before you share a cycle with anyone.
- Free predictions, daily insights and symptom tracking
- Friend Sync shares cycles with friends or partners
- Moon-phase features for people who enjoy them
- Astrology features will not appeal to everyone
- Premium tier focuses on horoscope and tarot extras
Samsung Health is the Android counterpart to Apple's Cycle Tracking. Samsung says the app is a free download on Google Play, and its Cycle Tracking feature monitors changes in your skin temperature during sleep to help manage your cycle.
It is most useful if you already wear a Galaxy Watch or Galaxy Ring, since the temperature readings come from those devices. Having cycle data next to sleep, heart rate and activity can help you spot patterns you would miss in a separate app.
If you do not own Samsung wearables, Clue or Euki will give you more on a phone alone.
- Free download on Google Play
- Uses skin temperature during sleep from a Galaxy Watch or Ring
- Keeps cycle data alongside sleep and fitness
- Temperature-based features need Samsung hardware
- Less period-focused content than Clue or Flo
How we picked these
We started with the period trackers people search for most and checked each one against official sources: the developer's website, privacy pages and policies, and the US App Store listing for price, in-app purchases, ratings and privacy labels. We looked at what the free version actually includes, where paywalls start, and any public enforcement history, such as the FTC order against Flo. We did not track cycles in each app for months, so we judged them on what can be checked: features, pricing, privacy promises and the data practices disclosed in app stores.
We favored apps that are clear about how they handle health data, and we say so plainly when an app has a known problem.
How to choose a period tracker you can trust
Decide how much data you want stored in the cloud
Cloud accounts make it easy to switch phones and keep years of history. Local-only apps like drip. and Euki keep data on your device, which is more private but means you are responsible for backups.
Read the privacy label and policy
On the App Store, scroll to App Privacy to see what the developer says it collects. Then skim the privacy policy for whether data is sold, shared with advertisers, or handed over in response to legal requests. Apps that explain this in plain language are usually a better bet.
Use the privacy settings that exist
If you pick Flo, turn on Anonymous Mode. On iPhone, keep two-factor authentication on so Health data stays end-to-end encrypted. With any app, set a passcode if it offers one.
Know what predictions can and cannot do
Period and fertile-window predictions are estimates based on past cycles. They get better as you log more months, but they are not a reliable way to prevent pregnancy. If you want an app-based birth control method, speak with a clinician about FDA-cleared options.
Watch the free trial prompts
Some apps push premium trials during setup. You can usually close them and keep using the free tracker, but check your subscriptions afterward so a trial does not turn into an annual charge.
FAQ
What is the best free period tracking app?
Clue is our top pick for most people because the free version is solid, the app is highly rated, and the company says it has never sold health data. If privacy is your main concern, Euki and drip. are both free and show "Data Not Collected" on their App Store labels. iPhone users can also use Cycle Tracking in the built-in Health app.
What is the best free cycle tracking app for privacy?
Euki and drip. collect the least data, according to their App Store privacy labels, and drip. keeps entries on your phone by default. Apple Health is another strong option because Apple says Health data is encrypted end-to-end when two-factor authentication is on.
Which period tracker is best for tracking ovulation?
Flo and Clue both offer ovulation predictions, though Clue's Conceive mode needs Clue Plus. Apple Watch Series 8 or later can give retrospective ovulation estimates from wrist temperature, and drip. supports the symptothermal method if you track temperature and cervical signs. Ovulation predictions are estimates, so talk to a doctor if you are trying to conceive and have concerns.
Can a period tracking app be used as birth control?
Free period trackers are not approved as contraception, and Clue says directly that it is not intended for that use. Natural Cycles describes itself as the only FDA-cleared birth control app, and it requires a paid subscription and a temperature-measuring device. Ask a clinician which method fits you.
Are free period tracking apps safe to use?
Most are safe for everyday tracking, but they differ a lot in how they handle data. Read the privacy label, turn on any privacy modes, and avoid apps that share data with advertisers. Flo's 2021 FTC settlement is a reminder to check rather than assume.
Do I need to pay for a period tracker?
No. Every app on this list tracks periods and predicts your next cycle for free. Paid tiers mainly add extra modes such as pregnancy or perimenopause tracking, deeper insights, or extras like horoscopes.
Sources
- https://helloclue.com
- https://apps.apple.com/us/app/clue-period-ovulation-tracker/id657189652
- https://flo.health
- https://flo.health/privacy-portal
- https://apps.apple.com/us/app/flo-period-pregnancy-tracker/id1038369065
- https://www.ftc.gov/news-events/news/press-releases/2021/06/ftc-finalizes-order-flo-health-fertility-tracking-app-shared-sensitive-health-data-facebook-google
- https://www.apple.com/health/
- https://support.apple.com/en-us/120356
- https://eukiapp.org
- https://eukiapp.org/app-features
- https://apps.apple.com/us/app/euki/id1469213846
- https://dripapp.org
- https://dripapp.org/faq
- https://apps.apple.com/us/app/drip./id1584564949
- https://stardust.app/faq
- https://www.samsung.com/us/apps/samsung-health/
- https://www.naturalcycles.com