Darkon is an icon pack. It is not a stand alone application you need a third party launcher to apply it.

What's included:

? 5.077+ HD icons (256x256)
? 172 matching HD cloud wallpapers!
? Launchers support: Action Adw AdwEX Apex Atom Aviate GO NextNova Smart Solo...
? Icon masking for un-themed icons
? Dynamic calendar (For Nova Launcher)
? Alternative icons to choose
? Updates.