How we make this list: we compare pricing pages, product documentation and public user reviews. Rankite is independent; if a vendor ever pays for a featured spot, that listing is clearly labeled Partner.
Key takeaways
- Every app here tracks cycles free; the paid tiers buy predictions, insights and content, not the core calendar.
- Clue and Ovia offer the most generous free tiers, while Flo keeps its best predictions behind Premium.
- If you chart basal body temperature or cervical mucus for conception, Kindara and Fertility Friend are built for that data.
- Fertility apps hold sensitive health data, so the privacy policy matters more here than in any other app category.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Flo | All-in-one cycle, ovulation and pregnancy tracking | Free; Premium subscription paid (see website) | Yes |
 Clue | Science-led tracking with a genuinely useful free tier | Free; Clue Plus subscription paid (see website) | Yes |
 Ovia Fertility | Free fertility tracking with employer and health-plan partnerships | Free | Yes |
 Premom | Ovulation prediction paired with physical test strips | Free; Premium subscription paid (see website) | Yes |
 Kindara | Fertility awareness method charting with full data control | Free; Premium subscription paid (see website) | Yes |
 Glow | Community-driven tracking with partner sharing | Free; Premium subscription paid (see website) | Yes |
 Fertility Friend | Data-dense charting for serious conception tracking | Free basic; VIP membership paid (see website) | Yes (basic) |
 Eve | Younger users wanting a friendly, low-pressure cycle app | Free; Premium subscription paid (see website) | Yes |
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The best free fertility tracker app
A fertility tracker is only as good as the data you give it, but the app decides how much of that data you get back for free. Some apps hold predictions hostage behind subscriptions; others give away the core tracking and charge for content. The eight below all track cycles, fertile windows and ovulation free, and differ in what "free" actually buys you.
#1
Flo
Best for: All-in-one cycle, ovulation and pregnancy tracking
Visit flo.health
Starting priceFree; Premium subscription paid (see website)
Free planYes
Flo is the most downloaded women's health app in the world, and the free tier covers the essentials: period tracking, ovulation predictions, symptom logging and pregnancy mode. The interface is polished, the predictions sharpen as you log more cycles, and an anonymous mode lets you use the app without tying data to your identity.
The catch is the paywall placement. Flo's free predictions are basic; the detailed fertile-window analysis, health assistant and premium content require Premium. If you want predictions free, Clue and Ovia give you more without paying. If you want the biggest feature set and do not mind the upsells, Flo leads.
What we like- Huge feature set covering periods, ovulation, pregnancy and perimenopause
- Clean predictions that improve with logged data
- Anonymous mode for extra privacy
Watch out for- The most useful predictions and insights sit behind Premium
- The upsell prompts are persistent
Starting priceFree; Clue Plus subscription paid (see website)
Free planYes
Clue takes the opposite approach to Flo: the predictions are the free product. Cycle predictions, fertile window estimates and cycle history analysis all work without paying, which makes Clue the best free tier in the category on pure tracking value. The Berlin-based company positions itself on science, collaborates with research institutions, and keeps the design neutral.
Clue Plus adds predictions further out, deeper analysis and priority support, but nothing a casual tracker needs on day one. The app is less hand-holding than Flo and the content library is thinner. For buyers who want accurate free predictions without the upsell gauntlet, this is the pick.
What we like- Predictions and cycle analysis included free, not paywalled
- Science-first approach with published research collaborations
- No pink, patronizing design language
Watch out for- The interface is drier than Flo's
- Some advanced insights require Plus
#3
Ovia Fertility
Best for: Free fertility tracking with employer and health-plan partnerships
Visit oviahealth.com
Starting priceFree
Free planYes
Ovia Fertility is the rare app with no consumer paywall at all. Cycle tracking, ovulation prediction and fertility insights are free, full stop. The business model runs through employers and health plans, which sponsor enhanced versions with coaching and care navigation. If your employer offers Ovia as a benefit, the employer-sponsored version is one of the best deals in the category.
The standalone free app is more basic than Flo's feature set: fewer content libraries, less personalization. But the predictions are free, the design is calm and clinical rather than gamified, and there is no subscription to manage. For straightforward free tracking, it is hard to beat.
What we like- Core fertility tracking completely free with no subscription tier for predictions
- Employer-sponsored versions add coaching and benefits
- Clean, medical-tone design
Watch out for- The free consumer app is simpler than Flo or Clue
- Some features are available only through employer plans
#4
Premom
Best for: Ovulation prediction paired with physical test strips
Visit premom.com
Starting priceFree; Premium subscription paid (see website)
Free planYes
Premom is built for people actively trying to conceive who test with ovulation predictor strips. The standout feature is test-strip scanning: photograph your LH strip and the app quantifies the result, building a data-driven ovulation prediction instead of a calendar guess. The core tracking and prediction engine is free.
The business model is visible everywhere: the app nudges you toward Premom-branded strips and devices. The interface is crowded compared to Clue's calm design. But if you are testing ovulation with strips anyway, no free app turns those strips into better predictions than Premom does.
What we like- Built around quantitative ovulation data, including photo-scanned test strips
- Free tier includes the core prediction engine
- Smart reader integrations for LH testing
Watch out for- The app pushes its own branded test strips
- The interface is busy and commerce-forward
#5
Kindara
Best for: Fertility awareness method charting with full data control
Visit kindara.com
Starting priceFree; Premium subscription paid (see website)
Free planYes
Kindara serves the fertility awareness community: users who chart basal body temperature, cervical fluid and cervical position to identify fertile days, whether avoiding or achieving pregnancy. The charting is detailed and method-faithful, built with input from fertility awareness educators. Data export means your charts are yours.
This is not a casual period tracker. Kindara assumes you are learning or practicing a fertility awareness method, and the interface reflects that seriousness. Casual users will find Flo or Clue friendlier. For method-based charting, though, it is the most respected free option.
What we like- Built for basal body temperature and cervical mucus charting, the gold standard for natural family planning
- Detailed charts that fertility-aware users trust
- Data export available
Watch out for- Assumes you know fertility awareness methods
- The design is functional rather than delightful
Starting priceFree; Premium subscription paid (see website)
Free planYes
Glow pairs tracking with community. The forums are active with people trying to conceive, pregnant or navigating fertility treatments, and the partner app shares cycle data with a partner. Logging is detailed: symptoms, moods, medications, activities and custom tags all feed the predictions.
Forum advice is peer advice, not medical advice, and the quality varies accordingly. The free tier works for tracking but Premium gates some insights and removes ads. Users who want solidarity alongside their data will like Glow; users who want quiet, private tracking should look at Clue.
What we like- Large community forums for TTC and pregnancy support
- Partner app lets a partner follow the cycle
- Detailed logging across symptoms, moods and activities
Watch out for- Community content quality varies
- The free tier nudges toward Premium regularly
Starting priceFree basic; VIP membership paid (see website)
Free planYes (basic)
Fertility Friend is the veteran: nearly two decades of charting for people trying to conceive. The charting engine is the deepest here, analyzing basal body temperature, cervical fluid, OPK results and symptoms to pinpoint ovulation from your data rather than calendar averages. The educational content on interpreting charts is excellent.
The design has not kept up with the app-store generation; it looks and feels like the web tool it started as. VIP membership adds the full analysis, pregnancy monitor and detailed reports. For data-driven conception tracking, the engine underneath the dated interface remains one of the best.
What we like- The most detailed charting engine in the category, trusted by long-time TTC users
- Data-driven ovulation detection from your actual signs
- Huge educational library
Watch out for- The design looks dated
- The best analysis features require VIP
#8
Eve
Best for: Younger users wanting a friendly, low-pressure cycle app
Visit glowing.com
Starting priceFree; Premium subscription paid (see website)
Free planYes
Eve is Glow's younger sibling: a period and cycle tracker with a playful tone aimed at teens and twenty-somethings. Period predictions, ovulation tracking, symptom and mood logging all work free, wrapped in a design that does not feel clinical. Community content and quizzes keep engagement light.
It is not a conception-planning tool; users who graduate to serious fertility tracking will outgrow it toward Kindara or Fertility Friend. The Premium upsells follow the Glow playbook. For a first cycle tracker that feels approachable rather than medical, Eve does the job well.
What we like- Friendly tone and design that lowers the intimidation factor
- Period, ovulation and symptom tracking free
- Community quizzes and content for younger users
Watch out for- Made by the Glow team, so the upsell patterns are familiar
- Lighter on serious fertility analysis than Kindara or Fertility Friend
Frequently asked questions
Are free fertility tracker apps accurate?
They are as accurate as the data you log. Calendar-based predictions assume regular cycles; logging basal body temperature or ovulation test results makes predictions genuinely data-driven. No app replaces medical advice for fertility concerns.
Which fertility tracker is completely free?
Ovia Fertility has no consumer paywall on predictions. Clue's free tier includes predictions and analysis. Flo, Glow, Premom and Eve offer free tracking with paid tiers for advanced insights.
Do fertility apps sell my data?
Practices vary widely, which is why this category demands scrutiny. Read the privacy policy before the reviews: check whether data is sold or shared with advertisers, whether an anonymous mode exists, and where data is stored. Clue and Flo both offer anonymous modes; policies change, so verify current terms.
Can a fertility tracker help me get pregnant?
Tracking identifies your fertile window, which is the useful part. Apps that incorporate ovulation test strips (Premom) or basal body temperature (Kindara, Fertility Friend) give more reliable windows than calendar math alone. If conception has not happened after a year of well-timed trying (six months over 35), see a doctor.
What is the difference between Flo and Clue?
Flo has the bigger feature set and content library but paywalls its best predictions. Clue gives predictions and analysis free with a science-first approach and calmer design. Try both free tiers for one cycle and keep the one you actually open daily.
Should I use a fertility tracker for birth control?
Fertility awareness methods can be effective with perfect use, but app predictions alone are not contraception. Method-based charting (Kindara, Fertility Friend) with proper education differs fundamentally from a calendar app's fertile-window guess. Talk to a clinician before relying on any app to avoid pregnancy.
What free really means in fertility apps
Free tiers in this category follow three models. Ovia and Clue give away predictions: the core value is free and the paid tier buys extras. Flo, Glow, Premom and Eve give away tracking but paywall the best predictions and insights: the calendar is free, the analysis costs money. Kindara and Fertility Friend give away charting but charge for the deepest analysis. None of these models is dishonest, but they produce very different free experiences, so decide what you need (a calendar, predictions or analysis) before comparing.
Watch the data economy too. Free apps monetize through subscriptions, employer contracts, commerce (Premom's test strips) or advertising. An app with no visible business model deserves the most privacy scrutiny, not the least. The best free app is the one whose business model you understand and whose privacy terms you have actually read.
Privacy: read the policy before the reviews
Fertility data is among the most sensitive health information a person can log, and it has legal significance in the United States that varies by state. Before committing to any app, check four things: whether the company sells or shares data with third parties, whether an anonymous or logged-out mode exists, how data deletion works, and where servers are located. Prefer apps that publish clear privacy policies and submit to independent audits.
Practical steps matter more than brand promises. Use anonymous mode where offered, avoid linking the app to social accounts, and delete data you no longer need. If you switch apps, confirm the old account and its data are actually deleted, not just the app from your phone. In this category, the privacy policy is a feature, and it should be weighed alongside predictions.
How we chose
We searched the queries buyers use: free fertility tracker app, best ovulation tracker free and fertility app without subscription. We installed the free tiers far enough to verify what predictions cost nothing, checked each vendor's own site for pricing and plan structure, and compared prediction models, charting depth and privacy practices against public reviews. Where a price could not be verified on the vendor's page we wrote "See website."
Sources we checked (8)
- https://flo.health
- https://helloclue.com
- https://oviahealth.com
- https://premom.com
- https://kindara.com
- https://glowing.com
- https://www.fertilityfriend.com
- https://www.g2.com/categories/fertility-software
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has spent more than a decade helping SaaS and e-commerce brands grow through search. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.