Avoid using the latest version of the GasBuddy app on your iPhone. The developer admits it is causing problems and has temporarily withdrawn it from the App Store until a fix can be released.
UPDATE: A fixed version of GasBuddy is available on the App Store. Users of this service should install this new version immediately.
GasBuddy lists crowdsourced gasoline prices. It’s free and useful enough to make our list of 50 essential iOS apps.