Novice–Expert+

by Luddy School of Informatics, Computing, and Engineering · Developer Tools

FeaturedManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

This extension logs the steps a user takes to perform a task and estimates the time an expert would take to complete each step.

Users

236

−3 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#59K

#50K among extensions

Version

1.0.5

updated 20 Mar 2024

Users

monthly, 3 years

Latest, 15 Oct 2026: 236 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 Oct 2026: 14 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Novice–Expert+

This extension identifies usability issues with a website or web app. The extension logs the steps a user takes to perform a task and estimates the time an expert would take to complete each step. This information may be saved as a CSV file, so that novice and expert performance may then be compared. The novice time divided by the expert time is the novice–expert ratio. If this ratio is above the average, it could indicate a usability issue. The user can also determine Fitts' law constants to estimate expert pointing time for different input devices.