The Clinical OB Wheel, Right in Your Pocket
Calculate estimated due dates, gestational age, and prenatal milestones on the go. Engineered as a 100% offline, privacy-first mobile companion for expectant mothers, midwives, and healthcare providers.
Google Play Store
The official release for Android smartphones and tablets. Packaged with zero external dependencies for fast, instant pregnancy calculations on Android 8.0 through Android 15+.
Currently undergoing Google Play Console review
Apple App Store
Tailored specifically for iPhone and iPad with smooth touch responsiveness, support for Dark Mode, and local iOS storage.
Scheduled for App Store submission
Why Choose the OB Wheel Mobile App?
Unlike slow web wrappers that require constant internet connections, the OB Wheel Calculator app is a true standalone native application.
100% Offline Capability
Medical environments such as ultrasound suites, rural clinics, and hospitals often have weak cellular reception. Our app requires zero internet connection to perform instant, exact pregnancy calculations.
Uncompromising Privacy
We do not track you. There are no advertising trackers, analytics SDKs, or account sign-ins. Your health data is stored strictly in your phone's encrypted sandbox storage and can be erased in one tap.
Rotary Obstetric Wheel Dial
Experience the intuitive feel of traditional paperboard pregnancy wheels with digital precision. Drag the dial to see gestational weeks, trimester progress, and due dates adapt immediately.
Clinically Accurate Naegele's Engine
Standard 28-day cycles are not universal. The app allows entering menstrual cycles ranging from 20 to 45 days, automatically adjusting ovulation and delivery timing according to obstetric standards.
Designed for Clarity and Efficiency
Explore the three intuitive navigation sections engineered into the mobile application.
Single-Screen Calculator
All critical dating parameters fit within a single viewport without vertical scrolling:
- ✓ Estimated Due Date (EDD)
- ✓ Gestational Age (weeks + days)
- ✓ Estimated Conception Date
- ✓ Days Remaining Countdown
- ✓ Trimester Progress Bar
Interactive Timeline
Dynamic developmental milestones tailored to your active gestational week:
- ✓ 1st, 2nd, and 3rd trimester date spans
- ✓ Active trimester highlight badge
- ✓ "Current Milestone" anatomical focus
- ✓ "Up Next" preview window
- ✓ Weekly physiological development tracker
Clinical Glossary & Info
Comprehensive educational resources and patient data controls:
- ✓ Expandable obstetric terminology accordion
- ✓ Naegele's Rule clinical explanation
- ✓ 100% Offline verification status
- ✓ Instant "Clear My Data" privacy button
- ✓ ACOG-aligned medical disclaimer
Frequently Asked Questions
Everything you need to know about downloading and using the OB Wheel mobile app.
Is the OB Wheel Calculator mobile app free to download?
Yes, the app is 100% free to download and use on both Android and iOS. There are no subscriptions, in-app purchases, locked premium features, or intrusive full-screen advertisements.
Does the mobile app require an internet connection?
No. The entire pregnancy calculation engine is compiled natively into the application. Once downloaded from Google Play or the App Store, the app works entirely offline — in remote clinics, rural areas, or on airplane mode.
Which platforms will the app be available on?
The app is being published on the official Google Play Store for Android devices and the Apple App Store for iOS devices (iPhone and iPad).
Is my personal health information safe?
Yes, completely safe. We do not collect names, email addresses, or medical records. No data is transmitted to external servers. You can permanently erase all stored calculations on your phone at any time using the "Clear My Data" button.
How accurate are the app's gestational age calculations?
The calculations strictly follow Naegele's Rule, the gold standard formula used in obstetrics worldwide. For women with cycles longer or shorter than 28 days, the engine adjusts the ovulation and due dates accordingly. As with any clinical dating tool, ultrasound measurements by a licensed healthcare provider remain the standard for medical confirmation.