Inches to / from cm converter

I like the app an options it allows

While it is clean and well written it useless when you can't go from centimeters to inches. This application is strictly a inch to centimeter tool until you see a small button on the bottom of the keyboard which switches the conversations. Why not just make it where a figure entered in either box enables the conversion. I.E. enter a value in the inch box causes a CM conversion. Then a CM value entered causes an inch value to be executed. Because of this lack of intuitiveness and the for help I

Please put a cursor in the number fields. I️ find myself tapping a field over and over to bring up a cursor that doesn’t exist.