Best Obscalc Apps

74+ iOS apps curated and reviewed

4.3 avg rating
17 free apps
Updated June 2026

Out of 74+ obscalc apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Obscalc

Obstetrics Calculator#1

Obstetrics Calculator by Alexander Snegirev

Editor's Choice
🏥 Medical
5.0(1 ratings)
FreeAdsIn-App Purchases
Obstetrics Calculator screenshot 1
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This medical app provides a comprehensive suite of tools for calculating gestational age, estimated due dates, and various risk assessments related to pregnancy and women's health. It includes calculators for maternity leave, cervical assessments, and cancer risk estimations, designed for healthcare professionals.

OB Calc (cloud)#2

OB Calc (cloud) by Glen Botha

By a doctor, for doctors
Strong Contender
🏥 Medical
5.0(5 ratings)
FreeIn-App Purchases
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This medical app helps obstetricians efficiently calculate key patient test date windows. It offers multiple calculation methods and allows for saving patient data and generating PDF reports. A free trial is available, followed by a subscription for full access.

OB Wheels#3

OB Wheels by Joshua D. steinberg

Worth Considering
🏥 Medical
2.3(15 ratings)
Free
OB Wheels screenshot 1
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This app calculates due dates, gestational age, and reconciles sonogram and LMP dates using a digital OB wheel and calendar. It offers a familiar interactive wheel for precise date calculations, accounting for leap years.

More Obscalc apps to explore

4
WUSM OB Calc
WUSM OB Calc
WUSM OB Calc
by Washington University in St. Louis
Free

This medical tool provides instant clinical support for OBGYNs and other healthcare professionals. It offers calculations and management guidance for common areas like VBAC success rates, Down syndrome risk, and intrauterine growth restriction. Data is evidence-based, drawn from literature and expert opinion.

VBAC success rate determinationDown syndrome risk assessmentPregnancy of unknown location management
🏥 Medical
(1)
free
5
Gestational Age (baby's age)
Gestational Age (baby's age)
Gestational Age (baby's age)
Calculator & Prenatal Care
Free

This app helps healthcare professionals quickly calculate gestational age, estimate due dates, and track prenatal care. It offers tools for monitoring pregnancy progress, including clinical charts, fetal weight estimation, and patient history organization.

Gestational age calculation (LMP & Ultrasound)Estimated Due Date (EDD) calculationPrenatal care tracking
🏥 Medical
(184)
free with in-app purchases
6
OB Calc Oficial
OB Calc Oficial
OB Calc Oficial
by Fernando Luiz Cunha Castelo Branco
$4.99

This medical app provides essential calculators and tables for obstetricians and healthcare professionals. It helps with calculating body surface area, estimated due dates, Glasgow Coma Scale, gestational age, and fetal measurements. It also includes CID-10 codes and various obstetric reference tables.

Gestational age calculationEstimated Due Date calculatorBody Surface Area calculator
🏥 Medical
(7)
paid
7
Perfect OB Wheel
Perfect OB Wheel
Perfect OB Wheel
Obstetrics calculator
$1.99

This app is a comprehensive obstetrics calculator that provides detailed pregnancy information. It offers flexible input options and displays thorough results including estimated due dates, gestational ages, and fetal growth estimates.

Flexible input (LMP, conception, EDC, ultrasound)Fast data entry optionsDetailed pregnancy results
🏥 Medical
(3.4K)
free with in-app purchases
8
Pregnancy Gestogram
Pregnancy Gestogram
Pregnancy Gestogram
by Isis Producciones y Cia. Ltda.
Free

Track your pregnancy progress and your baby's development with this app. It provides detailed information on fetal measurements, maternal changes, and weekly pregnancy insights, including 3D ultrasound images and videos.

Fetal biometry tracking (BPD, LF, weight, size)Maternal health metrics (weeks pregnant, due date, weight gain)Uterine height and contraction frequency
💪 Health & Fitness
(6)
free
9
OB Tracker & Pregnancy Wheel
OB Tracker & Pregnancy Wheel
OB Tracker & Pregnancy Wheel
Shared Patient Tracking
Free

This medical app helps track pregnancies and postpartum patients with detailed metrics and important dates. It allows secure sharing of patient information with colleagues via iCloud. A free version offers limited tracking, with subscriptions available for unlimited access.

Pregnancy and postpartum patient trackingCustomizable patient metrics and datesiCloud syncing for cross-device access
🏥 Medical
(45)
free with in-app purchases
10
FAST Pregnancy Calculator
FAST Pregnancy Calculator
FAST Pregnancy Calculator
For Healthcare Professionals
Free

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.

Calculate gestation by LMPCalculate gestation by ultrasoundPregnancy progress information
🏥 Medical
(4)
free
11
OB Wheel
OB Wheel
OB Wheel
Due Date Calculator
Free

This app assists expectant mothers and healthcare professionals in tracking pregnancy with accurate due date calculations and weekly fetal development updates. It offers customizable features, health tips, and tools for clinicians to support patient care throughout the journey to delivery.

Accurate due date calculationWeekly fetal development trackerCustomizable reminders and tracking
🏥 Medical
(7)
free
12
Gestational Age (by Medfolio)
Gestational Age (by Medfolio)
Gestational Age (by Medfolio)
Fast and Intuitive Calculation
Free

This medical app calculates gestational age based on information from leading health organizations. It provides pregnancy development insights but is not a substitute for professional medical advice or diagnosis.

Gestational age calculationBased on ACOG guidelinesInformation from U.S. health departments
🏥 Medical
(2)
free
13
My Pregnancy Calendar
My Pregnancy Calendar
My Pregnancy Calendar
by Sonya Marcarelli
Free

Track your pregnancy journey with a daily calendar, logger, and due date calculator. Monitor your progress, record daily notes, and access important pregnancy information. This app is designed to be accessible with Voiceover.

Pregnancy day and week indicationDue date and trimester computationDaily notes logging
💪 Health & Fitness
(202)
ad-supported
14
OB Wheel+
OB Wheel+
OB Wheel+
Pregnancy calculator for HCPs
Free

This medical app offers precise pregnancy calculations for healthcare professionals and expectant parents. It features multiple calculation modes, projected gestational age, and a timeline of key clinical milestones and screenings. Users can also filter milestones by trimester and compare fetal growth with relatable size comparisons.

Multiple calculation modes (LMP, EDD, IVF, GA)Projected gestational age calculationClinical milestone timeline
🏥 Medical
(1)
ad-supported
15
Obstetric Calculator Plus
Obstetric Calculator Plus
Obstetric Calculator Plus
by Mehdi Taghavi
Free

This medical app assists healthcare professionals in calculating gestational age, fetal age, and estimated due dates for pregnant patients. It also includes BMI calculation to support patient care.

Gestational age calculationFetal age calculationEstimated date of delivery
🏥 Medical
(6)
free
16
Prego OB Wheel
Prego OB Wheel
Prego OB Wheel
Obstetrics calculator
$4.99

This app is a simple obstetrical calculator and patient tracker. It helps healthcare professionals quickly determine pregnancy dates, gestational age, and track patient progress. Save patient information and notes for easy reference.

Calculate pregnancy dates (LMP, ultrasound, conception, EDD)Determine gestational ageTrack pregnancies
🏥 Medical
(319)
free
17
Due Date Calculator: Fertility
Due Date Calculator: Fertility
Due Date Calculator: Fertility
For Fertility Treatments
Free

This app calculates estimated due dates for pregnancy, particularly for those undergoing fertility treatments like embryo transfer or IUI. It can also determine due dates based on ovulation or natural conception.

Calculate due dates for fertility treatmentsCalculate due dates by ovulationCalculate due dates by natural conception
🏥 Medical
(13)
free
18
Obstetrum: OB-GYN Calculator
Obstetrum: OB-GYN Calculator
Obstetrum: OB-GYN Calculator
Gestational Age & Fetal Weight
Free
🏥 Medical
(0)
19
Pregnancy Calculators Pro
Pregnancy Calculators Pro
Pregnancy Calculators Pro
Maternity and Motherhood
Free

This app helps healthcare practitioners and pregnant women track pregnancy progress. It calculates gestational age, estimated due dates, and fetal weight using various formulas. It also offers helpful tips and recommendations for diet, exercise, and antenatal care.

Gestational age calculationEstimated due date (EDD) calculatorFetal weight estimation
💪 Health & Fitness
(0)
ad-supported
20
OB Wheel Pregnancy Tracker
OB Wheel Pregnancy Tracker
OB Wheel Pregnancy Tracker
Due Date Countdown OBGYN
Free

This app helps you estimate key pregnancy dates, including your due date, conception date, and last period. It offers tools to adjust predictions based on ultrasound findings or a known due date. Consult healthcare professionals for precise medical advice.

Last Period EstimatorUltrasound Date AdjustmentConception Date Calculator
🏥 Medical
(11)
free