Just slide the date wheel around with your finger. It's that easy. You can set it in seconds. It simply works like a real pregnancy wheel except that it is more accurate, factors in leap years, and no trees were cut down to make it. Other pregnancy wheels on the App Store are not actually wheels, and make you key in the dates. This one uses the touch interface to simulate a real pregnancy wheel and lets you set the date easily. Then you can play with the numbers and dates by sliding the wheel back and forth just like you might on a real wheel. This app keeps things simple and puts all the important data on one screen. Set the wheel based on LMP, CRL, BPD, or any date or measurement on the screen. Save patient settings for easy reference.