Looking at the Avenza site I gather you have the option to change a few things including display format which yields I gather E,N or lat/long.
I've an android app that is set to UTM Nad83 which is pretty close for my work with such a device.
Not sure if that's any help at all.
(I have a base station there and Coords are 392.115E, 534.497N. My cursor was just n'east of actual mark so gives an appreciation of insignificant difference.