While gas prices have fallen slightly from their all-time highs this spring, they still are not the bargain they were years ago. SmartFuel®, for the Iphone, integrates with Google Maps and Oil Price Information Service (OPIS), and provides you the fuel prices at the gas stations in your area or along your chosen route. SmartFuel® is free for 30 days and then has a number of pricing plans for you to choose from ($4.99 for 6 months, $8.99 for one year, $14.99 for two years). The app also enables you to track your fuel costs and savings. For me, the 30 day trial period was enough for me to figure out which stations were cheapest in my area, but if you live in a large metropolitan area or travel frequently, SmartFuel® would be a solid investment. Every time I drop off a rental car, I’m annoyed by the higher prices near every US airport. Developer Iridium reports that SmartFuel will be available on Android phones later this year.