Know when your Gmail emails are opened! Is Opened is a completely free and easy to use email tracking extension for Gmail. The perfect extension to show you which emails have been opened by your recipients, clients, or prospects. With Is Opened you have access in your Gmail interface to the number of opens of each mail. It's integrated seamlessly with your gmail, 100% free and super easy to install, only 3 clicks needed! ? 100% FREE VERSION, NO SUBSCRIPTIONS, NO SURPRISES !
