Best Pregnancy Calculator Apps

249+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated September 2026

Out of 249+ pregnancy 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 Pregnancy Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Pregnancy Calculators ProPregnancy Calculators ProFreeYesNoMay 2026
2FAST Pregnancy CalculatorFAST Pregnancy CalculatorFree4.0★ (5)NoNoAug 2026
3Pregnancy + | Tracker AppPregnancy + | Tracker AppFree4.8★ (75K)YesYesSep 2026
4Pregnancy Baby Tracker - WTEPregnancy Baby Tracker - WTEFree4.9★ (379K)YesNoSep 2026
5Pregnancy Calculator & DiaryPregnancy Calculator & DiaryFree4.6★ (355)YesYesSep 2026
6Pregnancy Calculator & TrackerPregnancy Calculator & TrackerFreeYesNoMay 2026
7Pregnancy App.Pregnancy App.Free4.9★ (23K)YesNoSep 2026
8BabyCenter Pregnancy TrackerBabyCenter Pregnancy TrackerFree4.9★ (296K)YesNoSep 2026

Top Picks for Pregnancy Calculator

FAST Pregnancy Calculator#2

FAST Pregnancy Calculator by Onur Ince

For Healthcare Professionals
Strong Contender
🏥 Medical
4.0(5 ratings)
Free
FAST Pregnancy Calculator screenshot 1
FAST Pregnancy Calculator screenshot 2
FAST Pregnancy Calculator screenshot 3
FAST Pregnancy Calculator screenshot 4
FAST Pregnancy Calculator screenshot 5

This medical app helps healthcare professionals quickly calculate pregnancy gestation weeks using last menstrual period dates or ultrasound scan data. It provides pregnancy progress information and is designed for busy medical staff.

Pregnancy + | Tracker App#3

Pregnancy + | Tracker App by Philips Digital UK Limited

Pregnant? Join over 80m moms!
Worth Considering
🏥 Medical
4.8😊(75K ratings)
FreeAdsIn-App Purchases
#3in Medical
Pregnancy + | Tracker App screenshot 1
Pregnancy + | Tracker App screenshot 2
Pregnancy + | Tracker App screenshot 3
Pregnancy + | Tracker App screenshot 4
Pregnancy + | Tracker App screenshot 5
Pregnancy + | Tracker App screenshot 6

Track your pregnancy week-by-week with expert advice, daily articles, and interactive 3D models of your baby's development. Features include a due date calculator, kick counter, and tools to plan for labor and organize appointments. Join millions of expecting parents worldwide.

What We Love

  • 🚀 Excellent pregnancy tracking app
  • 👍 Informative and useful features
  • 💡 Realistic 3D baby visuals
  • 👍 Helpful weekly updates and articles
  • 👍 Convenient appointment and weight tracking
  • 👍 Seamless transition to Baby+ app

Room to Improve

  • 🐛 Inaccurate due date and week calculations
  • 🐛 Bugs with loading articles and content
  • 💰 Paywall after 14 weeks
  • 🤷‍♀ Lack of customization and personalization
  • 🤷‍♀ Limited support for twin/multiple pregnancies

More Pregnancy Calculator apps to explore

FAQ about Pregnancy Calculator

Are there free pregnancy calculator apps for iPhone?
Yes — 20 of the top pregnancy calculator apps we rank are free to download, including Pregnancy Calculators Pro and FAST Pregnancy Calculator.
Pregnancy Calculators Pro shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 249+ pregnancy calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Pregnancy Calculators Pro calculates the estimated date of delivery (EDD) or due date based on your last menstrual period (LMP). It can also use ultrasonography (USG) biometrics like crown-rump length (CRL), biparietal diameter (BPD), and femur length (FL) for more precise calculations.
The app uses commonly used formulas for precise pregnancy parameter calculations. For fetal weight estimation, it utilizes the Hadlock or Shepard formulas.

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