Days since last visit: It’s an alternative of the one above. An active user can be a visitor who visited the website in the past X days.
Goals or events: An active user might be a visitor who completed a goal or triggered an event as well.
Page depth: The page depth illustrates the number of pages viewed during a visit. We could state that anything below 3 pages of an engaging section, like the shopping cart, isn’t really an active user.
Once you have defined what your active user is, you can filter the data using the device category to get only mobile active users. Here’s what a filter for active mobile users would look like:
That’s it! You can now report on mobile active users with your Google Analytics data.