Novice–Expert+ is a free Chrome extension developed by kmacdorm. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory.

This extension is designed to identify usability issues with websites or web apps. It accomplishes this by logging the steps a user takes to perform a task and estimating the time an expert would take to complete each step. The logged information can be saved as a CSV file, allowing for a comparison of novice and expert performance. The ratio of novice time to expert time, known as the novice–expert ratio, can help identify potential usability issues.

In addition, Novice–Expert+ allows users to determine Fitts' law constants, which are used to estimate expert pointing time for different input devices. This feature provides valuable insights into the efficiency of user interactions.

Overall, Novice–Expert+ is a valuable tool for evaluating the usability of websites and web apps. Its ability to log user steps and estimate task completion time makes it an essential asset for developers and designers seeking to optimize user experiences.