Lite Version deserves 5Star, but Full version need automatically calculate sales tax by GPS

It’s pretty useful for me.
However, I traveling all of the state from west to east as a Biz trip.
Mostly I have to check sales tax of current location first.
It’s really annoying.

I request, if it’s calculate sales tax automatically by GPS.
Then, I’ll buy full version

K2Bee about CheckPlease Lite - Tip Calculator, v4.4.1