Just like the real due date calculator OB wheel used by doctors! You have seen your doctor use this kind of wheel to quickly predict your due date - now get yours inside your iPad. ************* HOW TO USE ************* - Just slide the date wheel around with your finger. It's that easy! - To zoom the zodiac wheel, just click in the middle of the wheel, click again to close. ************ FEATURES ************ - Turn the wheel to set the date of last period or the date of conception, and you'll see at a glance the predicted due date. - See the dates corresponding to a number of gestation weeks - Bonus feature: predict the zodiac sign of your baby! - The wheel will remember its last position between uses. ************ WARNING ************ Date Wheels are for estimating purposes. They are not precise measuring devices and should not be relied on for exact calculations. All Date Wheels may have variations of 1-3 days in either direction.