Best Castatus First Response Apps

207+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated May 2026

Finding the right castatus first response app can be overwhelming with so many options. We've analyzed 207+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for Castatus First Response

Premom-Ovulation Tracker, PCOS#1

Premom-Ovulation Tracker, PCOS by Easy Healthcare Corporation

Period, Fertility & Pregnancy
Editor's Choice
💪 Health & Fitness
4.8😊(56K ratings)
FreeAdsIn-App Purchases
#66in Health & Fitness
Premom-Ovulation Tracker, PCOS screenshot 1
Premom-Ovulation Tracker, PCOS screenshot 2
Premom-Ovulation Tracker, PCOS screenshot 3
Premom-Ovulation Tracker, PCOS screenshot 4
Premom-Ovulation Tracker, PCOS screenshot 5
Premom-Ovulation Tracker, PCOS screenshot 6

Track your menstrual cycle, predict ovulation, and monitor fertility signs with this comprehensive app designed to help you plan or prevent pregnancy. Stay on top of your reproductive health easily and accurately.

What We Love

  • 🚀 Accurate ovulation tracking
  • 👍 Easy to use app
  • 💡 Helpful community support
  • 🚀 Affordable ovulation tests

Room to Improve

  • 🐛 Inconsistent data tracking
  • 🐛 Frequent app crashes
  • 🐛 Inaccurate ovulation predictions
Pregmate Ovulation Tracker#2

Pregmate Ovulation Tracker by Asteria LLC

Period • Fertility Test Reader
Strong Contender
💪 Health & Fitness
4.9😊(11K ratings)
FreeIn-App Purchases
#75in Health & Fitness
Pregmate Ovulation Tracker screenshot 1
Pregmate Ovulation Tracker screenshot 2
Pregmate Ovulation Tracker screenshot 3
Pregmate Ovulation Tracker screenshot 4
Pregmate Ovulation Tracker screenshot 5
Pregmate Ovulation Tracker screenshot 6

Track your fertility and menstrual cycle with ease using our innovative ovulation tracker. Stay informed about your most fertile days and optimize your chances of conception. Download now for a comprehensive approach to family planning.

What We Love

  • 👍 Easy to use
  • 📷 Ability to take photos of test strips
  • 🗓️ Helpful for tracking cycle and ovulation
  • 💰 Great value for money

Room to Improve

  • 🐛 Ovulation predictions not always accurate
  • 🔀 Inconsistent fertility window indicators across app
  • 🔍 Limited ability to manually adjust cycle data
Fertility Friend FF Tracker#3

Fertility Friend FF Tracker by Tamtris Web Services Inc.

Ovulation Cycle & Fertile Days
Worth Considering
💪 Health & Fitness
4.8😊(7.3K ratings)
FreeAdsIn-App Purchases
Fertility Friend FF Tracker screenshot 1
Fertility Friend FF Tracker screenshot 2
Fertility Friend FF Tracker screenshot 3
Fertility Friend FF Tracker screenshot 4
Fertility Friend FF Tracker screenshot 5
Fertility Friend FF Tracker screenshot 6

An advanced ovulation and period tracking app that helps you determine fertile days, track fertility signs, and offers personalized insights, tips, and analysis to aid conception. Enhance your fertility awareness and track your journey seamlessly with this comprehensive fertility friend app.

What We Love

  • 🚀 Accurate predictions
  • 💡 Comprehensive tracking features
  • 👍 Helpful educational resources
  • 🚀 Detailed data analysis

Room to Improve

  • 🐛 Frequent app crashes
  • 💰 Expensive premium features
  • 🔒 Privacy concerns

More Castatus First Response apps to explore

4
Natural Cycles Fertility App
Natural Cycles Fertility App
Natural Cycles Fertility App
Decode your hormonal health
Free

A highly effective FDA-cleared contraception app that tracks ovulation based on body temperature, offering hormone-free birth control and personalized fertility insights. It adapts to irregular cycles, provides daily fertility status, and supports natural family planning. Sign up for a subscription for a free thermometer and precise cycle monitoring.

💪 Health & Fitness
(29K)
5
Ovia Cycle & Pregnancy Tracker
Ovia Cycle & Pregnancy Tracker
Ovia Cycle & Pregnancy Tracker
Fertility, Ovulation, & Period
Free

Track your fertility, menstrual cycle, and overall health with this comprehensive app. Monitor ovulation, record symptoms, and get personalized insights to help optimize your reproductive health. Download now to take control of your fertility journey.

🏥 Medical
(89K)
6
Femometer Fertility Tracker
Femometer Fertility Tracker
Femometer Fertility Tracker
Ovulation & Period Calendar
Free

Track your cycle and monitor fertility effortlessly with this intuitive app. Stay informed about ovulation periods, track your menstrual cycle, and receive personalized predictions. Start optimizing your chances of conception today.

💪 Health & Fitness
(70K)
7
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 all in one place with the most comprehensive app of its kind. Get personalized insights, connect with a supportive community, and improve your chances of getting pregnant. Join millions of women who trust this app - start your journey to motherhood today! Download now.

💪 Health & Fitness
(74K)
8
Cycles: Period & Cycle Tracker
Cycles: Period & Cycle Tracker
Cycles: Period & Cycle Tracker
Fertility & Ovulation App
Free

A menstrual cycle tracking app that helps users monitor their periods, ovulation, and fertility. Keep tabs on your cycle and reproductive health effortlessly.

💪 Health & Fitness
(3.1K)
9
WeMoms - Pregnancy & Baby App
WeMoms - Pregnancy & Baby App
WeMoms - Pregnancy & Baby App
Suivi: Grossesse, Alimentation
Free

Connect with other expecting mothers, access expert advice, and track your pregnancy journey with ease. Join a supportive community today for personalized pregnancy support and guidance.

🏥 Medical
(26K)
10
Clue Period & Cycle Tracker
Clue Period & Cycle Tracker
Clue Period & Cycle Tracker
Ovulation & Fertility Calendar
Free

Track menstrual cycle, ovulation, symptoms, and fertility windows with this all-in-one period tracker. Stay informed about your reproductive health and get personalized insights to manage your menstrual health better. Download now to take charge of your cycle!

💪 Health & Fitness
(397K)
11
Flo: Period & Cycle Health
Flo: Period & Cycle Health
Flo: Period & Cycle Health
Ovulation & Pregnancy Calendar
Free

This application helps users track their menstrual cycle, ovulation, and fertility windows. It offers personalized insights, health tips, and a community forum for support. Download now to stay informed and empowered in managing your reproductive health.

💪 Health & Fitness
(847K)
12
Ovulation Calculator Fertile Tracker & Calendar OC
Ovulation Calculator Fertile Tracker & Calendar OC
Ovulation Calculator Fertile Tracker & Calendar OC
by Ovulation Calculator Pty Ltd
Free

Track your menstrual cycle, predict ovulation days, and stay informed about your fertile window with this app. Take control of your reproductive health and plan ahead with ease. Download now to stay on top of your fertility schedule.

🏥 Medical
(5.9K)
13
Glow Eve Period Tracker
Glow Eve Period Tracker
Glow Eve Period Tracker
Ovulation & Flow App
Free

Keep track of your menstrual cycle and fertility window with our user-friendly period tracking app. Monitor symptoms, predict ovulation, and stay informed about your reproductive health. Download now to take control of your cycle.

💪 Health & Fitness
(114K)
14
MyFlo® Period Tracker Calendar
MyFlo® Period Tracker Calendar
MyFlo® Period Tracker Calendar
Cycle Syncing® & Ovulation
Free

Track your menstrual cycle, symptoms, moods, and more with this innovative period tracker app. Sync your cycle with lifestyle factors for personalized insights and predictions. Download now for a harmonious cycle experience!

💪 Health & Fitness
(14K)
15
Ovulation & Fertility Tracker
Ovulation & Fertility Tracker
Ovulation & Fertility Tracker
Track Menstrual Period & Cycle
Free

Track your menstrual cycle, predict ovulation days, and keep tabs on fertility using this app. Stay informed about your reproductive health easily.

💪 Health & Fitness
(2.7K)
16
Menstrual Calendar FMC
Menstrual Calendar FMC
Menstrual Calendar FMC
Period Tracker, Fertile Days
Free

An intuitive period tracking and fertility prediction app, allowing users to record their menstrual cycles, moods, weight, and wellness data. Features include customizable tracking options, cycle statistics, privacy settings, and integration with FertilityFriend for advanced analytics. Take control of your cycle with accurate predictions and personalized reminders.

💪 Health & Fitness
(190)
17
MyDays X
MyDays X
MyDays X
Period & Ovulation Calendar
Free

Track your menstrual cycle, ovulation, and overall reproductive health with ease. Stay on top of your cycle and get personalized predictions. Download now for a smoother period tracking experience.

🌟 Lifestyle
(691)
18
amma: Pregnancy & Baby Tracker
amma: Pregnancy & Baby Tracker
amma: Pregnancy & Baby Tracker
Fertility to Newborn Weekly
Free

A comprehensive pregnancy tracking app with features for monitoring health, receiving personalized tips, and connecting with healthcare professionals. Stay informed and supported throughout your pregnancy journey.

🏥 Medical
(6.2K)
19
IVY Period & Pregnancy Tracker
IVY Period & Pregnancy Tracker
IVY Period & Pregnancy Tracker
Health & Cycle Calendar
Free

Track your menstrual cycle, fertility, and overall health with this comprehensive period diary and ovulation tracker app. Stay informed about your body's natural rhythms and make informed decisions. Download now to take control of your health.

💪 Health & Fitness
(68K)
20
HiMommy: Ovulation & Pregnancy
HiMommy: Ovulation & Pregnancy
HiMommy: Ovulation & Pregnancy
Period & Cycle tracker, Baby
Free

Stay informed and monitor your pregnancy with our all-in-one app. Track your baby's development, receive personalized tips, and connect with a supportive community of soon-to-be parents. Download now to embark on your pregnancy journey with confidence.

🏥 Medical
(4.9K)