Best Ovulation App in 2026: 9 Apps Compared

Flo is our pick for most people who want a simple, friendly tracker. You log periods, symptoms, and other signs, and the app predicts ovulation and future periods from that history. Pregnancy mode, health articles, and community features make it useful beyond a single cycle, without requiring test kits or a thermometer.

Accuracy depends on what you log. Calendar predictions are estimates, especially with irregular cycles, and logging ovulation tests or temperature gives a better picture than dates alone. Flo is a good starting point, but it is not a medical device and should not be used alone for contraception decisions.

Clue appeals to people who want detailed tracking without a cluttered interface. You can log many symptoms, moods, and cycle signs, and the app uses that history to predict ovulation and periods. Its science-led approach and privacy messaging also matter to users who think carefully about health data.

Like Flo, Clue predictions improve with consistent logging, especially for irregular cycles. It does not read ovulation test strips, so people who rely on LH tests may prefer Premom alongside or instead of Clue. For a calm, private-feeling tracker, Clue is a strong choice.

Premom is the pick for people trying to conceive who use ovulation predictor kits. Photograph a test strip and the app reads the result, charts LH levels over time, and helps spot a surge. That visual trend is more useful than a single positive or negative result, especially when cycles vary.

If you do not use test strips, Premom loses much of its edge over Flo or Clue. It is also focused on conception, so people who mainly want period tracking may find it too narrow. For LH-based tracking, it is the most practical app in this list.

Natural Cycles is different from the other apps here. It is a regulated method that uses basal body temperature to identify fertile days, and it can be used for planning pregnancy or for contraception within its approved use. That status means it follows a defined method, not just a calendar estimate.

It also demands consistency. You need to log temperature regularly, using a thermometer or a compatible wearable, and follow the method as directed. It is not free, and it is not the best pick for casual period tracking. For people who specifically want a temperature-based method, it is the leading option, but talk to a clinician before using any method for contraception.

Fertility Friend has long been the go-to app for detailed temperature charting. It lets you log temperature, cervical mucus, ovulation tests, symptoms, and many other signs, then analyses the chart to identify ovulation. For people who want to understand their own data in depth, that detail is valuable.

The interface feels older than Flo or Clue, and new users may find the number of options overwhelming at first. Take time to learn chart basics, or use its educational content before relying on a chart. For serious temperature tracking, Fertility Friend remains hard to beat.

Glow suits people who want fertility tracking plus support from a community and a partner. You can log cycles, symptoms, and ovulation signs, share progress with a partner, and join forums for trying to conceive, pregnancy, and parenting. That social side helps some users stay consistent with logging.

Community is not for everyone, and Glow can feel busy compared with Clue or Apple Health. Its predictions are still estimates based on logged data, so use ovulation tests or temperature if you need a clearer signal. For tracking with community support, Glow is a good fit.

Ovia Fertility is a straightforward free tracker for people who want fertility predictions without a paid subscription. Log periods, symptoms, and ovulation signs, and the app predicts fertile days and future cycles. Health content and pregnancy tracking add value if your needs change over time.

It does not offer the same depth of temperature charting as Fertility Friend, nor test strip reading like Premom. For a simple, free starting point, that trade-off is reasonable. Pair it with ovulation tests if you want a stronger ovulation signal than calendar predictions alone.

Apple Health is the best low-effort option for iPhone users who want basic tracking with strong on-device privacy. Cycle tracking is built into the Health app, with period logging, symptom notes, and predictions based on logged history. No separate account or subscription is needed.

It is basic by design. There is no test strip reading, no detailed temperature charting like Fertility Friend, and no community. Android users need another app entirely. If you want simple, private tracking and already use an iPhone, Apple Health is a sensible, free place to start.

Stardust suits people who want cycle tracking to feel like a short daily habit rather than a medical chart. Log your period, symptoms, and mood, and the app predicts future cycles and fertile days from that history. Its friendly design makes it easy to open every day, which helps predictions improve over time.

Like other calendar-based trackers, Stardust predictions are estimates and work best with regular cycles and consistent logging. People who need test strip reading or temperature charting should look at Premom or Fertility Friend instead. For a gentle, free tracker, Stardust is worth trying.