The ActivePrint Desktop App lets you print to any printer connected to your Windows PC or Mac PC. Simply download and install the appropriate app to your PC to start printing from your iPad/iPhone/iPod Touch from anywhere in the world.
If you have a Windows PC (Windows Vista, Windows 7, Windows 8)
Don’t forget to sign up for ActivePrint Cloud Printing Service!
ActivePrint Cloud Printing Basic Service – $3.99/year – Print Files from Dropbox, Files from Other Apps, Photos, Emails, Contacts, and content from the clipboard.
ActivePrint Cloud Printing Pro Service – $9.99/year – All the features of Basic and create shared files through ‘Print to QR Code’.