MEASUREMENT OF DEVICE USAGE VIA THE USE OF AN ACCESSIBILITY API AND CONFIGURABLE RULES ENGINE

A user interface change event is detected. An app identifier of an associated third party app is determined. A dynamic rule data structure associated with the app identifier of the associated third party app is determined. A user interface match state specified by the dynamic rule data structure is determined based on absolute screen positioning or relative screen positioning. A current user interface state of the associated third party app is determined by querying an accessibility API. Upon determining that the user interface match state matches the current user interface state, at least one user interface report field specified by the dynamic rule data structure is determined and at least one report field property of the at least one user interface report field is extracted by querying the accessibility API. An active session data structure associated with the dynamic rule data structure is updated to store the extracted property value.