Ive been using Gas Guru for a few years now. This app by far has the best graphic user interface utilizing a color code system for best prices on gas on the map. The only negative (yet large) feature the app still doesnt incorporate, is the ability for users to confirm or adjust gas prices in real time. Other apps have this feature and I believe it to be necessary for 5 stars. Look at the frustration in other reviews of users showing up to gas stations and the prices are incorrect. I think apps like "Waze" have proved the power of social groups to provide accurate real-time updates.
Fix this major flaw and youll have yourself a solid 5 star app hands down.
Matt Heaven about Gas Guru: Cheap Gas Prices