Heartbeats - system information that we receive from SDK in background. Average period of heartbeats is around 2 hours, but it also depends on a stability of user's internet connection.
Heartbeats help to indicate if the user has an installed application with active SDK and also shows other system information such as statuses of granted permissions, device model, OS version, etc.
NOTE: all the API methods below will be replaced with new ones before 31.03.2021