A man talks on a mobile phone in front of an Apple logo outside an Apple store in downtown Shanghai in this September 3, 2012 file photo. (REUTERS/Aly Song/Files)

Apple has rejected an app that keeps track of U.S. drone strikes internationally, sparking cries of censorship.

Drones+ uses media reports to map out U.S. drone attacks.

Apple rejected the app as "objectionable and crude."

"Drones+ is an application that shows no depictions of the carnage of war and reveals no secret information," reads a petition to Apple on left-wing site Root Action.

"Drone wars continue because the U.S. public is unaware what is being done in our name with our money. We are interested in knowing where our government is using drones and has killed people, not in celebrating that killing."

The U.S. government says drones rarely harm civilians, but a recent New York University study estimates only 2% of drone casualties are top military leaders.

The U.K. Bureau of Investigative Journalism says between 474 to 884 civilians have been killed by American drones since 2004, including 176 children.

Apple didn't reply to requests for comment.