Hi @benjaminmason and thanks for your query. Tobii provides a number of Software Development kits that are designed to work together with our eye trackers to allow the gaze data for both interactive and analysis purposes.
You can have a look at the SDK’s’ currently supported for the 4C @ https://developer.tobii.com/consumer-eye-trackers/ which come with a number of programming sample applications to help you get started.
Whilst we do not provide a metrics application directly that would include eye gaze speed, etc.. development of such an application would be well within the scope of the SDK offerings.