Best Free Period Tracking App in 2026: 8 Apps Compared

Clue is our pick for most people because it pairs a usable free tier with a privacy posture that is easier to trust than many rivals. The free app covers period, symptom and mood logging with predictions based on your history, and it handles irregular cycles more flexibly than tools built around a fixed 28-day pattern. Its design is clinical and gender-neutral, which suits a wide range of users.

Clue is based in Berlin and operates under GDPR, and its privacy materials state that it does not sell personal data. That does not mean your data never leaves your phone, since Clue stores data in the cloud, so you should still read the current policy before logging sensitive symptoms. Clue Plus, listed at $39.99 per year, adds deeper analysis and advanced predictions, but the free tier is enough for basic cycle tracking.

Flo has the broadest toolset of any free period tracker, with core cycle tracking, symptom logging, a large health content library and a community. The free tier covers the basics well, and Premium, listed at $47.99 to $59.99 per year in app store listings, adds a health assistant, expert videos and community chats. For users who want content and community alongside tracking, Flo is the fullest package.

Privacy is the honest caveat. The FTC finalized an order against Flo in 2021 after alleging it shared sensitive health data with firms including Facebook and Google despite privacy promises, and a related class action reached a proposed settlement in 2026. Flo has since added an Anonymous Mode that lets you track without personal identifiers linked to health data. Read the privacy settings, use Anonymous Mode if it fits your needs, and decide whether that history matters to you.

Stardust stands out on design and daily habit. It frames each day with hormone context and a clean, distinctive look, which makes opening the app feel like a ritual rather than a chore. Free core tracking covers periods and basic symptoms, and friend syncing lets you share cycle timing with a partner or friend if you choose.

The trade-off is depth. Symptom logging is more moderate than Clue or Flo, and some features require in-app purchases, with annual plans listed around $24.99 to $39.99. Stardust also stores data in the cloud, so it is not a local-only privacy pick. Pick it if design and daily use keep you logging consistently, since a tracker you actually use beats a deeper one you abandon.

Apple Health Cycle Tracking is the simplest free option for iPhone users because it is already on the phone. You log periods, symptoms and spotting in the Health app, and it can estimate ovulation retrospectively using wrist temperature data from a compatible Apple Watch. There is no separate account to create and no subscription to manage.

The limits are scope and platform. Tracking is basic compared with Clue or Flo, there is no community, and Android users cannot use it. Privacy is stronger by design, since data lives in Health with encryption options, but you should still check your iCloud settings. If you want basic, private tracking with no new app, Apple Health is the easiest start.

Euki is the privacy-first pick for users who do not want cycle data in the cloud at all. It is developed by a nonprofit, stores your data only on your device, and does not run ads or sell data. That local-only design removes the main risk that worries many period tracker users: a cloud database of sensitive health data that could be shared, breached or subpoenaed.

The cost of that privacy is simplicity. Predictions are basic, there is no community, and features are thinner than Flo or Clue. Euki is available on iOS and Android, which helps, but users who want rich content, wearable sync or fertility coaching will find it sparse. If privacy is your top priority, Euki is the clearest free choice in this list.

Drip is an open-source period tracker that also keeps data on your device rather than in the cloud. Being open source means its code can be inspected, which gives privacy-minded users an extra layer of confidence that commercial apps cannot match in the same way. It supports import and export, so you are not locked into the app if you later switch.

Drip is deliberately simple. It relies on manual inputs, predictions are basic, and the interface is plainer than Clue, Flo or Stardust. There is no community, no content library and no wearable integration to speak of. Pick Drip if you value open code and local storage above polish, and pair it with a calendar reminder if you need prompts to log regularly.

Glow is organized around trying to conceive, with cycle and ovulation tracking, fertility insights and a community of users at a similar stage. It also connects to a family of apps for pregnancy and baby tracking, so users can stay in one ecosystem as their needs change. The free tier covers core tracking, which is enough to start charting cycles.

Privacy needs a careful read here. Glow faced a California attorney general settlement in 2020 and a later privacy bug report, so its history is not clean. The free tier is ad-supported, and advanced charts and analysis sit behind Premium, listed around $59.99 per year on its site and up to $69.99 in app store listings. If fertility tracking is your main goal and you accept those trade-offs, Glow is useful, but Clue or Euki are safer privacy picks.

Natural Cycles is different from every other app here because it is an FDA-cleared digital contraception tool, not just a period tracker. It estimates ovulation from basal temperature readings and gives red days, when pregnancy is possible, and green days, when it is not, based on its cleared algorithm. That regulatory status sets it apart for users who want app-based birth control.

The price and the workload are the barriers. There is no free tier beyond a trial, with an annual plan listed at $149.99 per year including a temperature band in some listings, and it needs regular temperature input to work well. Irregular cycles also weaken its fit, since the algorithm relies on consistent data. Do not use it as contraception without reading its instructions and limitations carefully, and talk to a clinician if you have irregular cycles or health conditions.