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Best Period Tracker Apps in 2026: 9 Apps Compared

By ToolNimba Editorial Team October 28, 2026 11 min read

Best Period Tracker Apps
  1. Top pick
    Clue logoClue

    Science-based cycle tracking

    Starting priceFree
    Check out ClueRead our review
  2. Runner-up
    Flo logoFlo

    Health content and community

    Starting priceFree
    Check out FloRead our review
  3. Also great
    Natural Cycles logoNatural Cycles

    Temperature-based fertility tracking

    Starting priceSee website
    Check out Natural CyclesRead our review

How we researched this

We compared official pricing and feature pages, app store listings, privacy policies and public user reviews. Prices change, so check the provider's site before you pay.

Key takeaways

  • Clue and Flo offer the broadest free starting points, while Natural Cycles is the most medical in its approach and is paid only.
  • Privacy policies differ a lot, so read how each app stores, shares, and deletes cycle data before you log sensitive details.
  • Predictions are estimates based on past cycles, not guarantees, and they work best when you log consistently for several months.
  • If you want to conceive, avoid pregnancy, or manage irregular cycles, choose an app built for that goal rather than a general calendar.

Quick comparison

NameBest forStarting priceFree plan
ClueScience-based cycle trackingFreeYesVisit
FloHealth content and communityFreeYesVisit
Natural CyclesTemperature-based fertility trackingSee websiteNoVisit
GlowTrying to conceive and community supportFreeYesVisit
OviaPregnancy and cycle tracking in one placeFreeYesVisit
StardustPrivate, astrology-inspired trackingFreeYesVisit
EukiPrivate tracking without an accountFreeYesVisit
DripOpen-source, local-only trackingFreeYesVisit
Period CalendarSimple, low-cost daily loggingFreeYesVisit

The best period tracker apps

We compared official feature pages, app store listings, pricing pages, privacy policies, and public reviews for apps that still work on iOS and Android in 2026. The list below covers free trackers, paid fertility tools, and privacy-focused options, so you can match the app to your goal.

01Clue logo

Clue

Best for: Science-based cycle tracking

Check out Clue
Starting priceFree
Free planYes
Clue website
helloclue.com homepage

Clue suits people who want a calm, data-first tracker without a lot of social features. You can log bleeding, pain, mood, sleep, exercise, and many other symptoms, then review cycle length and variation over time. That history view helps you spot patterns instead of relying on a single predicted date.

The catch is that the most useful analysis tools require Clue Plus. The free tier covers essential tracking and basic predictions, which is enough for many users. Before you commit, check the current Plus price in the app store, since prices vary by region and plan length. This app is not medical advice, and it should not be used as a contraceptive unless you are using a separately cleared feature and understand its limits.

What we like
  • Wide symptom and cycle tracking
  • Clear cycle analysis views
  • Berlin-based company with GDPR-focused privacy pages
Watch out for
  • Advanced insights sit behind a paid plan
  • Predictions still depend on regular logging
02Flo logo

Flo

Best for: Health content and community

Check out Flo
Starting priceFree
Free planYes
Flo website
flo.health homepage

Flo is a good fit if you want tracking plus a lot of reading material in one place. The app covers periods, ovulation, pregnancy, and general health topics, and it includes community discussions for people who want peer support. Daily logging is quick, and the health insights can help you learn what changes across your cycle.

The downside is the frequent push toward Premium. Core tracking works without paying, but many insights and programs sit behind the subscription. Flo also faced regulatory scrutiny in the past over data sharing, so we suggest checking its current privacy settings and Anonymous Mode options before entering sensitive information. Predictions remain estimates, not medical diagnoses.

What we like
  • Large library of health articles and videos
  • Symptom, mood, and sleep tracking
  • Optional Anonymous Mode
Watch out for
  • Premium content is heavily promoted
  • Past privacy concerns mean you should read the current policy carefully
03Natural Cycles logo

Natural Cycles

Best for: Temperature-based fertility tracking

Check out Natural Cycles
Starting priceSee website
Free planNo
Natural Cycles website
naturalcycles.com homepage

Natural Cycles is different from a simple calendar app because it uses basal body temperature, and optionally wearable data, to estimate fertility each day. For users who want a hormone-free, app-based method, that medical clearance and structured approach set it apart. The app gives a daily status and explains which days it classes as fertile or not fertile.

That structure comes with real work. You need to measure temperature regularly, follow the app instructions closely, and accept that missed readings reduce accuracy. It is also a paid product, so check the current annual price and what is included, such as a thermometer or wearable band, before you subscribe. This is not a casual tracker, and anyone with irregular cycles, recent childbirth, or a medical condition should talk to a clinician first.

What we like
  • FDA-cleared algorithm for contraception in the United States
  • Temperature-based daily fertility status
  • Clear red and green day system
Watch out for
  • No lasting free tier
  • Requires consistent temperature measurement
  • Less suited to very irregular cycles
04Glow logo

Glow

Best for: Trying to conceive and community support

Check out Glow
Starting priceFree
Free planYes

Glow works well for people who are trying to conceive and want both tracking and community in one app. You can log basal temperature, cervical mucus, ovulation tests, symptoms, and medications, and the app builds fertility charts from that data. Its forums cover trying to conceive, pregnancy, and parenting, which some users find reassuring during a long process.

The free version includes ads and repeated Premium prompts, which can feel distracting. Premium adds more detailed insights and removes some limits, but it does not make predictions certain. If you prefer a quieter, more private tracker, Glow may feel busy. Still, for fertility-focused logging, its depth is hard to match at the free starting price.

What we like
  • Fertility, ovulation, and pregnancy modes
  • Active community forums
  • Partner app options for shared tracking
Watch out for
  • Ads and Premium upsells in the free tier
  • Predictions depend on detailed daily input
05Ovia logo

Ovia

Best for: Pregnancy and cycle tracking in one place

Check out Ovia
Starting priceFree
Free planYes

Ovia is best for people who want one family of apps that follows them from cycle tracking into pregnancy and early parenting. The fertility app covers periods, ovulation, and symptoms, while the pregnancy app adds week-by-week milestones, kick counting, and symptom logs. That continuity is useful if you do not want to move your history to a new app later.

The trade-off is scope. Ovia covers a lot, so the app can feel less focused than a single-purpose period tracker. Some coaching and program features depend on an employer or health plan, so availability varies. Read the privacy policy for the specific Ovia app you download, since data handling can differ across its products.

What we like
  • Separate apps for fertility, pregnancy, and parenting
  • Milestone and symptom guidance
  • Free core tracking
Watch out for
  • Some features are tied to employer or health plan programs
  • Interface can feel broad rather than focused
06Stardust logo

Stardust

Best for: Private, astrology-inspired tracking

Check out Stardust
Starting priceFree
Free planYes

Stardust appeals to users who want privacy controls plus a lighter, more personal tone. The app tracks periods, symptoms, mood, and sexual activity, and it pairs cycle phases with astrology content for people who enjoy that angle. Its privacy pages describe encryption and anonymous use, which is a strong point in a category where trust matters.

If you have no interest in horoscopes, you can ignore that layer and use Stardust as a straightforward tracker. The main limit is that Premium adds more detailed insights, so free users get a simpler view. Check the current Premium price and privacy settings in the app before you rely on it for fertility decisions, since predictions are still estimates.

What we like
  • End-to-end encryption options and anonymous mode
  • Cycle and symptom tracking with horoscope content
  • Clean, modern design
Watch out for
  • Astrology features will not appeal to everyone
  • Some advanced features require Premium
07Euki logo

Euki

Best for: Private tracking without an account

Check out Euki
Starting priceFree
Free planYes

Euki is a strong choice for privacy-first users who do not want to create an account to track a period. The app was built with reproductive health organizations, and it stores data locally on the device rather than in a cloud account. It also includes plain information about contraception, abortion, and sexual health, which is useful for people who want education alongside tracking.

The simplicity is also the limit. You will not get the same prediction charts, community, or wearable sync found in larger apps. If you lose your phone without a backup, your history may be lost. For users who rank privacy above advanced features, that trade is often worth it.

What we like
  • No account required
  • Data stays on your device
  • Includes sexual health information and resources
Watch out for
  • Smaller feature set than mainstream apps
  • No cloud sync if you change phones without a backup
08Drip logo

Drip

Best for: Open-source, local-only tracking

Check out Drip
Starting priceFree
Free planYes

Drip is the pick for people who want full transparency about how a tracker works. Because the code is open source and data stays on the device, you do not need to trust a company privacy promise in the same way. It covers period dates, symptoms, and fertility estimates in a simple calendar view.

That focus means Drip feels plain next to Flo or Clue. There is no community, no content library, and no automatic sync across devices. If you want a private, no-cost log and you are comfortable managing your own backups, Drip does that job well. If you want rich predictions, choose a larger app instead.

What we like
  • Open-source code anyone can inspect
  • Local-only storage with no account
  • No ads or tracking in the app itself
Watch out for
  • Basic interface
  • Limited predictions and no cloud backup by design
09Period Calendar logo

Period Calendar

Best for: Simple, low-cost daily logging

Check out Period Calendar
Starting priceFree
Free planYes

Period Calendar by Abvio suits people who want a tracker that just works, without lessons, forums, or social features. You open the app, log your period, add symptoms and notes, and check upcoming dates at a glance. Reminders help if you often forget to log, and the app works well for users who only need basic predictions.

The app is not the best choice for fertility charting or deep cycle analysis. Its charts and insights are simpler than Clue or Glow, and some features sit behind a paid tier. For straightforward daily logging, though, that simplicity is the point, and the free tier covers the basics.

What we like
  • Simple calendar and symptom log
  • Reminders for periods and ovulation
  • Low learning curve for new users
Watch out for
  • Design feels dated next to newer apps
  • Advanced insights require a paid upgrade

How we picked these

We started with apps that are live on iOS or Android in 2026, then checked official feature pages, app store listings, pricing, and privacy policies. We kept apps that truly track periods or fertility, and we left out general health apps that only mention cycles in passing. Where prices vary by region or plan, we list the starting price as free or direct you to the vendor site rather than quoting a figure we could not verify.

How to choose the right period tracker for you

Start with your main goal

If you only want to know when your next period may start, a free calendar app is enough. If you are trying to conceive, look for temperature, ovulation test, and cervical mucus logging. If you want to avoid pregnancy, do not rely on a general tracker, and consider a cleared method or advice from a clinician.

Check privacy before you log

Read how the app stores data, whether it sells or shares data, how you can delete your history, and whether you can use it without an account. Privacy policies change, so the settings inside the app matter as much as the marketing page. For sensitive health data, a local-only or encrypted option may be a better fit than a community-heavy app.

Give predictions time

Most apps improve after three to six months of consistent logging. Log start and end dates first, then add symptoms that matter to you, such as pain, mood, or sleep. If your cycles are irregular, focus on history and ranges rather than a single predicted day, and seek medical advice for sudden changes, very heavy bleeding, or cycles that stop without explanation.

Sources

  1. https://www.helloclue.com
  2. https://flo.health
  3. https://www.naturalcycles.com
  4. https://www.glows.org
  5. https://www.oviahealth.com
  6. https://www.stardust.app
  7. https://eukiapp.org
  8. https://bloodyhealth.gitlab.io
  9. https://www.abvio.com
  10. https://www.go-go-gaia.com/blog/clue-vs-flo-vs-natural-cycles.html
  11. https://www.go-go-gaia.com/blog/how-to-choose-period-tracker-app.html

Frequently asked questions

What is the best period tracker app free?

Clue, Flo, and Stardust all offer useful free tiers for basic period and symptom tracking. Clue is the most data-focused of the three, Flo adds more health content, and Stardust adds stronger privacy options. Try the free tier for a full cycle before paying for Premium, since the paid features matter more for fertility analysis than for simple date tracking.

What is the best cycle tracking app for irregular periods?

Clue and Apple Health-style history logs work well because they show ranges and past cycle lengths instead of only one predicted date. Drip and Euki also suit irregular cycles if you prefer local-only tracking. No app can diagnose why cycles are irregular, so talk to a clinician if variation is new, large, or paired with pain or other symptoms.

What is the best period and ovulation tracker app?

Glow and Natural Cycles are the strongest fertility-focused options here, but they serve different needs. Glow is a free community tracker with detailed fertility charts, while Natural Cycles uses temperature data and a cleared algorithm for contraception and fertility planning. Choose Glow for flexible tracking, and Natural Cycles only if you will measure temperature consistently and follow its instructions.

Is a period tracker app safe for privacy?

Safety depends on the app and your settings. Local-only apps such as Drip and Euki reduce cloud risk, while larger apps may offer anonymous modes, encryption, and deletion tools. Read the privacy policy, turn off optional data sharing where possible, use a strong passcode, and avoid logging details you would not want stored in a cloud account.

Can a period tracker replace birth control?

No, a general period tracker should not be used as birth control. Calendar predictions can be wrong, especially with irregular cycles, illness, stress, or travel. Natural Cycles is an exception in that it has a cleared algorithm, but even that method requires correct daily use. If avoiding pregnancy matters, use a method you understand and discuss options with a clinician.

What is the best free period app for teens?

A simple, private tracker such as Euki or Drip can be a good starting point, since they do not require an account and keep data on the device. Clue also offers clear educational content and a free tier. Parents and teens should review privacy settings together and remember that these apps provide general information, not medical advice.

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