Eye-Tracking Options

Some links for various eye-tracking options:

Tobii (hardware, variety of markets including gaming, well-established)

https://gaming.tobii.com/

iMotions (hardware, higher-end research, well-established)

https://imotions.com/eye-tracking/

GazeRecorder (Webcam Eye-Tracking with an API GazeFlow)

https://gazerecorder.com/

https://gazerecorder.com/gazecloudapi/ (embed in your own webapp)

RealEye (Webcam Eye-Tracking on a study-based platform)

https://www.realeye.io/

Hawkeye (iOS using TrueDepth camera, limited to latest iOS devices)

https://www.usehawkeye.com/

Skyle for iPad (hardware, new in 2020)

https://eyev.de/en/

EyeZag (camera-based, no longer accepting new customers)

https://eyezag.com/

WebGazer.js (camera-based, browser, open source)

https://webgazer.cs.brown.edu/

SeeSo (mobile eye-tracking)

https://seeso.io/

https://visual.camp/

Useful:

10 Most Used Eye Tracking Metrics and Terms

https://imotions.com/blog/10-terms-metrics-eye-tracking/

And a summary related to mobile games:

TrackMaze: A Comparison of Head-tracking, Eye-tracking, and Tilt as Input Methods for Mobile Games

https://www.yorku.ca/mack/hcii2018b.html

"Mobile eye-tracking has progressed in recent years but compared to desktop eye-tracking, 'it is still in its infancy'"