Overview
LIAP supports Google Play Realtime Developer Notifications and App Store Server Notifications out of the box. Server notifications is a mechanism to receive push notifications from the service provider (Google Play or Apple) whenever there is a change in user's subscription status. These notifications allow you to immediately react to subscription changes, avoiding the need to poll the APIs for updates.
note
Note that inefficient use of the Google Play Developer API can lead to API quota restrictions. So, it is recommended to depend on the server notifications.