The Wheel HD is the most accurate, powerful and easiest-to-use gestational age calculator in the entire App Store! You use it just like an analog wheel on the iPad!

The Wheel HD recreates the classic obstetric wheel/gestational age calculator (also known as a pregnancy wheel) that is used every day by doctors, obstetricians, midwives, nurses, and pregnant women.The Wheel HD is a professional tool that replaces and enhances the functionality of those worn-out cardboard wheels without compromise.

The Wheel HD 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 Wheel HD also estimates fetal weight based on gestational age and displays the month and trimester of pregnancy as well as the number of days completed and remaining in the pregnancy.

However, in its primary day-to-day role for healthcare providers, when the EDD is already known, The Wheel HD enables the precise calculation of the gestational age of a fetus at anytime during pregnancy in LARGE, easy-to-read characters.