Initializing your app to capture app usage
App usage measures the number of times a specific app is brought to the foreground, and
then sent to the background. To capture app usage in your mobile app, the MobileFirst Analytics
client SDK must be configured to listen for the app lifecycle events.
Creating a custom chart for average session duration
The duration of an app session is a valuable metric to visualize. With any app, you want
to know the amount of time that users are spending on a particular session.