ObWheel

ObWheel is a handy app that puts the traditional pregnancy dates wheel into the palm of your hand! ObWheel is useful for expectant parents as well as obstetricians, family physicians, nurses, midwives, and students. It uses the date of Last Menstrual Period (LMP) to calculate Estimated Due Date (EDD) and Gestational Age (GA). No more imprecise paper wheels - this tool is always at hand, in your pocket!

We've separated the outer and inner wheels to make this easy-to-use. Spin the green wheel to set the LMP date. Spin the purple wheel to browse important milestones, and to calculate the gestational age on a specific date (displayed in the middle).

Prefer to enter dates manually? No problem. Select "Set" and choose dates by LMP, EDD, or GA on a specific date. Use the "Info" screen to see important dates (trimesters, testing and windows) and information on fetal biometry reference ranges (Lessoway) based on current gestational age.

Need to calculate the EDD from a dating ultrasound report? Rotate the purple wheel until the GA shown matches the GA on the ultrasound report. Then, rotate the green wheel until the date matches the date of the ultrasound. The EDD will be displayed below. Alternatively, input the GA and ultrasound date manually in the "Set" screen.

ObWheel is a universal app and works on the iPhone and iPad! We are continually working to improve ObWheel, and appreciate your feedback.