How in the world does one determine which app is using location services? Whenever I activate my iPhone (wake it up from sleep), the location services indicator is on. Sometimes it goes off after a few moments, but other times it stays on forever. When I look in location services under the Privacy settings, there are no purple arrows, which suggests that nobody was using location services for the last 24 hours. There are a few gray arrows, but all of them are for apps that are designated as "while using." Clearly, having location services turned on so much is a battery drain. How do I figure out what the offending app is? For what it's worth, if I turn off and reboot my iPhone, then location services does not turn on automatically upon wake up, at least for a few minutes.