The OB Wheel Pro 7 Downloads & RevenueThe OB Wheel Pro 7 · App Store
The OB Wheel Pro 7 is #54 in Medical Paid in Brazil and charting in 7 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
24 Sep 2026Full timeline · 8 events in the last 12 months
- 📈The OB Wheel Pro 7 new best rank in the overall chart: #192Top Paid · All Apps · BR
- 📈The OB Wheel Pro 7 entered the top 10Top Paid · Medical · IT
- 📈The OB Wheel Pro 7 entered the top 100Top Paid · Medical · GB
- 📈The OB Wheel Pro 7 entered the top 100Top Paid · Medical · DE
- 📈The OB Wheel Pro 7 entered the top 10Top Paid · Medical · BR
- 📈The OB Wheel Pro 7 charting in a new countryGermany
- 🆕The OB Wheel Pro 7 first spotted by AppInsider#55 in Top Paid · Medical · Canada
- 🆕The OB Wheel Pro 7 released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Medical PaidThe OB Wheel Pro 7 on the App Store
App details
App privacy Measured
The OB Wheel Pro 7’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 0 linked to your identity and 0 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
The OB Wheel Pro 7 downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Active users
All platforms, worldwide. Free with an account.
How this is calculated
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Brazil | MedicalPaid | #54 |
 United Kingdom | MedicalPaid | #141 |
 India | MedicalPaid | #93 |
 Italy | MedicalPaid | #75 |
 Indonesia | MedicalPaid | #56 |
 Germany | MedicalPaid | #186 |
 France | MedicalPaid | #131 |
Apps near The OB Wheel Pro 7 on the chart
Medical Paid, around #54.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about The OB Wheel Pro 7
From the 5 most recent App Store reviews in the US.
Users appreciate the app's interface and utility for charting but report significant technical failures on Apple Watch. Recent reviews highlight that the watch companion is broken, causing frustration despite the core mobile functionality being praised.
Mixed but leaning positive (60% of recent reviews give 4–5 stars). Recent reviews are more negative than earlier ones.
About The OB Wheel Pro 7
The OB Wheel Pro 7 is a state-of-the-art gestational age calculator (also known as an obstetric or pregnancy wheel) that is used every day by doctors, obstetricians, midwives, nurses, and pregnant women. The OB Wheel Pro 7 is a professional tool that replaces the need for multiple apps and it greatly enhances the functionality of those worn-out cardboard wheels without compromise.
The OB Wheel Pro 7 accurately determines the estimated delivery date (EDD), or due date, of a pregnancy based on the first day of a woman's last menstrual period (LMP), or from the date of conception, or from a known gestational age (GA) on a known date, e.g. from an ultrasound measurement, or from fetal biometry like Crown-Rump Length (CRL), Femur Length (FL), and BiParietal Diameter (BPD). Additionally, for appropriate gestational ages, The The OB Wheel Pro 7 estimates fetal weight and displays the number of days completed and remaining.
The OB Wheel Pro 7, besides calculating GA from fetal ultrasound biometrics, enables clinicians to also calculate Estimated Fetal Weight (EFW) from FL, BPD, Head Circumference (HC), and Abdominal Circumference (AC) using the most appropriate published reference formula using the maximum and most appropriate parameters.
Prenatal care providers know that there are key gestational ages where testing or interventions are needed. The OB Wheel Pro 7 lets providers see at a glance when these items should be scheduled.
FEATURES
• Includes Apple Watch app!
• Gestational Age Calculator from LMP, EDD, Conception Date for any reference date
• Gestational Age calculated from specific date and gestational age (e.g. ultrasound)
• Gestational Age Calculator using fetal biometrics (CRL, FL, BPD)
• Fetal Weight Calculator using HC, AC, FL, BPD
• Body Mass Index (BMI) Calculator
• Age-Adjusted Risk Table for Trisomy 21 and aneuploidy
• List of key completed weeks during pregnancy
• Pregnancy days completed and remaining, and dates for each trimester
• Remembers last-used EDD
PRO TIPS:
• To enter Gestational Age, CRL, FL, or BPD for a specific date (like for an ultrasound exam), tap "Today", enter the desired date, then tap on the button displaying the gestational age to change that button to display options for entering a specific GA, CRL, FL, and BPD.
• When using the GA calculator, double-tap a date to change the value to the current date.
• When using the EFW calculator, double-tap a value to clear the value of the selected parameter.
