To use Gas Spotter, first you need to set up your gas stations.
Open Gas Spotter.
Choose "Settings" then "Stations."
Select an empty station field (e.g. "1 empty)"
Enter the name of the station
Enter the Zip+4. This is available from the Station Edit page or by searching for the station address at zip4.usps.com/zip4/ on the USPS web site. This is optional for now.
From the main screen, select the station you want to enter prices by using # (pound sign) to go forward and * (asterisk) to go back.
You can use up and down on the directional pad to change the individual digits or enter them directly using the keypad. If you use the keypad, the next number will automatically be selected. To change digits, use left and right on the directional pad (if available).