With the rapid adoption of mobile eye-tracking devices in academic and consumer research, ensuring data reliability is increasingly important. This study offers an independent evaluation of the Pupil Neon (Pupil Labs GmbH), a new affordable, user-friendly mobile eye-tracker requiring no calibration, by comparing its performance to the established gold-standard EyeLink 1000 Plus (SR Research Ltd.) on a variety of tasks. Using Ehinger et al. (2019)’s test battery, a set of 10 tasks evaluated the accuracy and its decay over time of some of the most common eye-tracking-related parameters. This includes fixations on a large grid to assess spatial accuracy, smooth pursuits, free viewing to evaluate eye movements and gaze trajectories, microsaccades, blinks, pupil size variations, fixations on a small grid to evaluate the decay of accuracy over time, fixations during head yaw and head roll movements, and fixations on a small grid after head movements to assess their influence on accuracy. Gaze position, eye movements and pupil diameter associated with each task were recorded simultaneously by the two eye-trackers for direct comparison. The results provide valuable insights into the Pupil Neon’s specific characteristics and performance in recording various eye movements and performing different tasks. These findings will help identify situations where the Pupil Neon excels and highlight tasks that might be less advisable to conduct with this device due to differing eye movement considerations, guiding researchers in aligning device performance with the requirements of their studies.