Best Ovulation Calculator Apps

201+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated July 2026

Out of 201+ ovulation calculator apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Ovulation Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Ovulation Calculator Fertile Tracker & Calendar OCOvulation Calculator Fertile Tracker & Calendar OCFree4.6★ (5.9K)NoNoJul 2026
2Period & Ovulation CalculatorPeriod & Ovulation CalculatorFree4.4★ (609)YesYesAug 2026
3Period Tracker Period CalendarPeriod Tracker Period CalendarFree4.9★ (172K)YesYesAug 2026
4Premom-Ovulation Tracker, PCOSPremom-Ovulation Tracker, PCOSFree4.8★ (58K)NoYesAug 2026
5Flo Cycle & Period TrackerFlo Cycle & Period TrackerFree4.7★ (1.9M)NoYesAug 2026
6Glow Ovulation & Period AppGlow Ovulation & Period AppFree4.7★ (74K)YesYesAug 2026
7Natural Cycles Fertility AppNatural Cycles Fertility AppFree4.8★ (30K)YesYesAug 2026
8Period Tracker and CalendarPeriod Tracker and CalendarFree4.8★ (53K)YesYesAug 2026

Top Picks for Ovulation Calculator

4.6😊(5.9K ratings)
Free
Ovulation Calculator Fertile Tracker & Calendar OC screenshot 1
Ovulation Calculator Fertile Tracker & Calendar OC screenshot 2
Ovulation Calculator Fertile Tracker & Calendar OC screenshot 3
Ovulation Calculator Fertile Tracker & Calendar OC screenshot 4
Ovulation Calculator Fertile Tracker & Calendar OC screenshot 5

This app helps users identify their most fertile days to increase the chances of conception. It analyzes personal cycle data, offers fertility knowledge, and provides access to a supportive community.

What We Love

  • 🚀 Accurate predictions
  • 👍 Easy to use
  • 💡 Helpful information and tips
  • 🚀 Reliable tracking

Room to Improve

  • 🐛 Crashes/glitches
  • 🐛 Inaccurate predictions
  • 🐛 Issues logging data
Period & Ovulation Calculator#2

Period & Ovulation Calculator by AESTHETIC WIDGETS LTD

Fertility Tracker & Calendar
Strong Contender
💪 Health & Fitness
4.4(609 ratings)
FreeAdsIn-App Purchases
Period & Ovulation Calculator screenshot 1
Period & Ovulation Calculator screenshot 2
Period & Ovulation Calculator screenshot 3
Period & Ovulation Calculator screenshot 4
Period & Ovulation Calculator screenshot 5
Period & Ovulation Calculator screenshot 6

This app helps users track their menstrual cycles, predict ovulation dates, and identify fertile windows. It also assists in calculating pregnancy test dates and expected labor dates, offering a comprehensive tool for family planning and fertility awareness.

Period Tracker Period Calendar#3

Period Tracker Period Calendar by ABISHKKING LIMITED.

Cycle Tracker & Ovulation
Worth Considering
💪 Health & Fitness
4.9😊(172K ratings)
FreeAdsIn-App Purchases
#35in Health & Fitness
Period Tracker Period Calendar screenshot 1
Period Tracker Period Calendar screenshot 2
Period Tracker Period Calendar screenshot 3
Period Tracker Period Calendar screenshot 4
Period Tracker Period Calendar screenshot 5
Period Tracker Period Calendar screenshot 6

This app helps women track their menstrual cycles, ovulation, and fertility. It offers personalized advice, pregnancy tracking, and reminders for birth control and medication. Your data is kept private and stored locally on your device.

What We Love

  • ⭐ Accurate period tracking
  • 📆 Helpful calendar and diary features
  • 🌟 Customizable themes and pets
  • 🔍 Comprehensive symptom and health tracking

Room to Improve

  • 🔍 Unclear symptom definitions
  • 🔔 Intrusive and unskippable ads
  • 🔒 Concerns about data privacy and security

More Ovulation Calculator apps to explore

4
Premom-Ovulation Tracker, PCOS
Premom-Ovulation Tracker, PCOS
Premom-Ovulation Tracker, PCOS
Fertility, Period & Pregnancy
Free

This app helps women track their menstrual cycles, predict ovulation, and monitor fertility to increase chances of conception. It offers personalized insights, expert guidance, and tools like BBT charting and ovulation test scanning. Users can also track pregnancy progress and connect with a supportive community.

Ovulation test scanning and LH level quantificationAutomatic BBT thermometer syncing and chartingPeriod and cycle logging with symptom tracking
💪 Health & Fitness
(58K)
free with in-app purchases
5
Flo Cycle & Period Tracker
Flo Cycle & Period Tracker
Flo Cycle & Period Tracker
Ovulation & Pregnancy Calendar
Free

This app helps women track their menstrual cycles, ovulation, and fertility. It offers personalized insights, pregnancy support, and tools for managing perimenopause symptoms, with a focus on data privacy and security.

Period and ovulation trackingFertility and pregnancy supportSymptom and mood logging
💪 Health & Fitness
(1.9M)
free with in-app purchases
6
Glow Ovulation & Period App
Glow Ovulation & Period App
Glow Ovulation & Period App
FDA Listed Fertility Tracker
Free

Track your menstrual cycle, ovulation, and fertility signs with personalized insights. Improve your chances of getting pregnant and better understand your body. Connect with a supportive community for advice and shared experiences.

Menstrual cycle trackingOvulation predictionFertility sign tracking
💪 Health & Fitness
(74K)
freemium
7
Natural Cycles Fertility App
Natural Cycles Fertility App
Natural Cycles Fertility App
Decode your hormonal health
Free

This app helps women track their hormonal health and fertility using body temperature data. It offers hormone-free contraception, pregnancy planning, and insights into various cycle stages. It adapts to individual cycles, even irregular ones, providing daily fertility status.

Hormone-free contraceptionOvulation tracking via temperaturePersonalized cycle adaptation
💪 Health & Fitness
(30K)
subscription
8
Period Tracker and Calendar
Period Tracker and Calendar
Period Tracker and Calendar
Track your Cycle & Ovulation
Free

This app helps users track their menstrual cycle, including ovulation, fertility, and periods. It offers discreet reminders, detailed symptom logging, and personalized insights for better health management and planning. The app also includes features for birth control pill reminders and perimenopause tracking.

Track periods, ovulation, and fertilityLog symptoms, moods, and flowBirth control pill reminders
💪 Health & Fitness
(53K)
free with in-app purchases
9
Ovia Cycle & Pregnancy Tracker
Ovia Cycle & Pregnancy Tracker
Ovia Cycle & Pregnancy Tracker
Fertility, Ovulation, & Period
Free

Track your menstrual cycle, fertility, pregnancy, postpartum recovery, and menopause with personalized insights and expert articles. This app offers tools for ovulation prediction, baby growth tracking, and symptom management.

Period & Fertility calendarPregnancy tracker with baby growthPostpartum recovery modes
🏥 Medical
(90K)
free with in-app purchases
10
Ovulation & Fertility Tracker
Ovulation & Fertility Tracker
Ovulation & Fertility Tracker
Track Menstrual Period & Cycle
Free

This app helps users track their menstrual cycles, predict ovulation dates, and identify fertile windows to increase chances of conception. It offers a user-friendly interface to input cycle details and provides reminders for periods and ovulation.

Ovulation calendarFertility predictionPeriod and ovulation reminders
💪 Health & Fitness
(2.7K)
subscription
11
Pregmate Ovulation Tracker
Pregmate Ovulation Tracker
Pregmate Ovulation Tracker
Period • Fertility Test Reader
Free

Easily track ovulation, predict fertile days, and understand your cycle. Scan test strips with your phone's camera for automatic analysis. Get personalized insights and reminders to maximize your chances of conception.

Accurate ovulation predictionsTest strip reader with auto-detectionPersonalized fertility window tracking
💪 Health & Fitness
(12K)
free with in-app purchases
12
Ovulation calculator (cycle)
Ovulation calculator (cycle)
Ovulation calculator (cycle)
( menstrual cycle )
Free

This app helps users track their menstrual cycle to predict ovulation and fertile days. By inputting the start and end dates of the last period, users can estimate their ovulation day and potential pregnancy window.

Menstrual cycle trackingOvulation day calculationFertile window prediction
🏥 Medical
(2)
ad-supported
13
Clue Period & Cycle Tracker
Clue Period & Cycle Tracker
Clue Period & Cycle Tracker
Ovulation & Fertility Calendar
Free

This app helps women and people with cycles understand their bodies through period tracking, fertility predictions, and health insights. It offers personalized forecasts, tracks over 100 experiences, and provides science-based content. Connect wearables for advanced health analysis.

Personalized period predictionsTrack 100+ cycle-related experiencesFertility and ovulation calculator
💪 Health & Fitness
(400K)
free with in-app purchases
14
Femometer Fertility Tracker
Femometer Fertility Tracker
Femometer Fertility Tracker
Ovulation & Period Calendar
Free

This app helps women track their menstrual cycles, predict ovulation, and monitor fertility. It records period dates, symptoms, and test results to provide personalized insights and increase conception rates. It also supports users throughout pregnancy with tracking and educational resources.

Period and PMS trackingOvulation and fertile window predictionBasal Body Temperature (BBT) charting
💪 Health & Fitness
(70K)
free with in-app purchases
15
My Cycle ؜
My Cycle ؜
My Cycle ؜
Ovulation & Period Tracker
Free

Easily track your menstrual cycles and ovulation dates. Get timely reminders for your next period and identify your most fertile days for conception. This app also serves as a personal journal to log symptoms, mood changes, and other important events.

Period trackingOvulation predictionFertility window identification
💪 Health & Fitness
(92K)
free
16
Ovulation Calculator App
Ovulation Calculator App
Ovulation Calculator App
by ViralMD
Free

This fertility companion helps women track their cycles to understand their fertile window. Input your last period date and cycle length to calculate ovulation and identify optimal times for conception or avoidance.

Fertility trackingCycle calculationOvulation prediction
🏥 Medical
(1)
free
17
Ovulation: Period Calculator
Ovulation: Period Calculator
Ovulation: Period Calculator
Fertility & Pregnancy Calendar
Free
💪 Health & Fitness
(0)
18
Ovulation Tracker & Calculator
Ovulation Tracker & Calculator
Ovulation Tracker & Calculator
Period Calendar & Menstrual
Free

This app helps users track their menstrual cycles, predict ovulation, and identify fertile days to increase the chances of conception. It offers features like period tracking, symptom logging, and cycle length analysis for a better understanding of reproductive health.

Period trackingOvulation predictionFertility days calculator
💪 Health & Fitness
(5)
free with in-app purchases
19
Period Tracker - Menstrual & Ovulation Calendar
Period Tracker - Menstrual & Ovulation Calendar
Period Tracker - Menstrual & Ovulation Calendar
by BHI Technologies, Inc.
Free

This app helps users track their menstrual cycles, predict fertile and ovulation days, and log symptoms and moods. It offers smart cycle calculations and a pregnancy mode to assist with conception or avoidance. Features include passcode protection, data backup, and elegant design.

Track and predict period, fertile, and ovulation daysLog symptoms and moodsPregnancy mode
💪 Health & Fitness
(269)
free with in-app purchases
20
MyDays X
MyDays X
MyDays X
Period & Ovulation Calendar
Free

This app helps women track their menstrual cycles, predict fertile days, and monitor various health symptoms. It offers intelligent notifications, a community chat, and detailed tracking options for a comprehensive overview of reproductive health.

Period and ovulation predictionFertile day trackingSymptom and mood logging
🌟 Lifestyle
(752)
free with in-app purchases

FAQ about Ovulation Calculator

What are the best ovulation calculator apps for iPhone?
Ovulation Calculator Fertile Tracker & Calendar OC tops our ovulation calculator apps ranking as of July 2026, with a 4.6-star average from 5.9K App Store ratings, and it's free to download.
Yes — 20 of the top ovulation calculator apps we rank are free to download, including Ovulation Calculator Fertile Tracker & Calendar OC and Period & Ovulation Calculator.
Ovulation Calculator Fertile Tracker & Calendar OC has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 201+ ovulation calculator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
The app helps users identify their most fertile days by analyzing their unique menstrual cycle, health, and lifestyle data. It aims to increase the chances of conception by providing accurate predictions and insights into fertility.
Key features include cycle data analysis for predictions, an ovulation calculator, a fertile window viewer, fertility charting, daily insights, a fertility knowledge portal, and access to an online support network for users trying to conceive.

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