The gestational age calculator was created to supplement and replace the pregnancy wheel. Although it is an application designed for professionals, anyone can use it because of its user-friendly UI. The LMP dating and menu screens are the first two screens you see while using the gestational age calculator. Additional displays can be accessed using the menu buttons Use the back button or swipe up or down to return to the on-start displays from these menu screens.

On start Screens (Horizontal swipe):
1) Dating with LMP Screen: Calculations are based on the last menstrual period. Besides calculating the due date and gestational age several other weeks are calculated.
2) Menu screen

Menu Screens (Longitudinal swipe or back button – to go back):
1) Dating with USG screen: Ultrasound measurement result as weeks and days used for calculations
2) Dating with CRL screen: CRL measurement result as mm used for calculations
3) Dating with IVF screen: Embryo transfer date and the age of the embryo in days used for calculations
4) Dating with due date screen
5) Discrepancy calculation screen: Calculates the difference and degree of discrepancy between LMP gestational age and calculated LMP from the ultrasound measurements
6) Dating with HC – head circumference screen
7) Dating with SFH – symphysis fundal height screen
8) Institute of Medicine pregnancy weight gain chart screen
9) hCG doubling time calculator screen
10) Intergrowth-21st gestational weight gain calculator screen
11) Bishop score calculator screen
12) Settings screen

Through the share icon, current screen can be shared as an image without any ads with other programs, such as mail or WhatsApp. There is no need for the reset function because all the results are updated when the calculate buttons are pushed. However, the reset function can also be used to initialize the screen.

Application works offline. Only banner advertisements are present in the application interface at the top of the window. Of note, there is no year selection which is handled by the application. By tapping the result labels, all of the calculated results can be text-copied to the clipboard.