Raccoon is a Google Play desktop client that allows you to download Android APK files to your desktop PC and archive them there. This allows you to check out apps anonymously without Google knowing you installed them, install an app on a secondary device which does not have access to Google Play or is not officially supported by the app in question, revert to a previous version in case an update causes trouble, conserve bandwidth on mobile devices by maintaining a local cache from which to distribute the apps, or check the permissions of an app from your desktop PC.