App
On the app home screen, tap Find Gas at the top to find prices in your immediate area. Note- location settings will need to be enabled to find prices in immediate area. To search by city or Zip/Postal code, tap the magnifying glass in the top right-hand corner of the page.
You can also access the Find Gas page by tapping the fuel pump icon at the bottom of your app screen.
Some stations (US only) offer a discount for paying by cash/debit versus credit card. If you click into Station Details and see a little toggle above "Show me Cash Prices", you can toggle it on to view Cash prices only. Toggle it off to view credit prices. You can also set a filter when searching for stations to only view stations with "Offers Cash Discount" as an amenity.
Web
Go to www.gasbuddy.com, and type in your city or zip/postal code, then hit Find Gas. You can also select the Gas Tools menu at the top of the page to access Maps.