Gas price comparisons for the United States and Canada are available online by ZIP code, city or state on websites such as GasBuddy.com and GasPriceWatch.com. Additionally, GasBuddy offers a free mobile app, enabling users to search gas prices on the go.
The GasBuddy app is a mobile version of the website and is available on many popular mobile devices. GasPriceWatch.com does not have a mobile app available as of 2015. Both GasBuddy and GasPriceWatch.com are community-driven sites, collecting gas price information from their users. GasBuddy offers points that users can cash in for prize giveaway entries. GasPriceWatch.com raffles off cash prizes each quarter to qualified spotters.