Apple has been pretty strict on BitTorrent clients — or anything related to torrent downloading — for iOS, and it does its best to keep them out of the App Store, meaning you must jailbreak your device if you want to install one. However, the Cupertino company appears to have let one slip through its net. Transmission RPC, although not a full-fledged BitTorrent client, is a $1.99 app that allows you to control Transmission for Mac OS X from your iOS device.