Great Except for IPhone 4s Users

I have an iPhone 4s, and the app does not allow me to click on any search buttons because they hang 3/4 of the way off the screen. I have re-downloaded and reinstalled the app several times, and it still will not let me scroll further to hit the button (I have tried to no avail). Please fix!

Stallion1298 about Greyhound: Buy Bus Tickets, v2.1.901