These are one-time purchases that grant "lifetime" access to a specific version of the software. They are often preferred by university labs with fixed grants. Subscription Models:

A is a unique alphanumeric code required to activate and unlock the full suite of professional eye-tracking tools offered by Tobii Pro Lab . This software is a cornerstone for researchers in psychology, marketing, and human-computer interaction, enabling them to design, record, and analyze complex eye-tracking experiments. How to Obtain Your License Key

Go to the License section in the main menu.