We value your independence. Why should you be limited to one computer because of license agreements or other technical reasons? You should be able to use any computer, anywhere, anytime.
Most professional screen magnifiers today offer a USB version, but all of them require administrative privileges to install some software before they can run. Odds are if you're using a public computer, you won't be granted installation rights. Moreover, a computer can be a very personal possession and others won't appreciate you installing software on it. iZoom's USB version is truly portable. No installation and no administrative access required to get it running. It just works!