Tracking usage within an app ecosystem
Our service has an app ecosystem that includes iOS, Android, and a single page web application (as compared to a route-based web site).
Currently we are tracking each app with separate GA tracking id's. This is causing usage data to be split in separate buckets when we are really interested in how users are using the services across various devices. What is the best practice for tracking usage in GA for app ecosystems? Is event-based (as opposed to screen-based) the more recommended approach? Should we consider using the same tracking id for all apps to gain holistic insights?