Apple cites questionable content policy
I'm not sure I understand exactly why a company would want to make an app that tracks exactly where the United States uses its drones during military action overseas. A company was denied approval for just such an app called Drones+ recently. Apple cited objectionable content is the reason for denying approval.
The app appears to overlay any location where the totality occurred during an attack using a US drone. It's unclear whether the app is calling attention to the fatalities presumed to be of non-combatants are not.