Here’s a easy way to save up money for some of the other apps on this list: Install Gas Guru, and use it to find the cheapest gas in your area. Nearby stations are displayed on a map, along with color indicators that show how good the pricing is. You can also compare prices in multiple locations, such as home and work, to figure out the best place to fill up. You’ll have app money in no time.
Link: Gas Guru (Free)