I've jumped into using Grouped Notifications which is supported on Android 7 and above. I've reviewed your example but I'm not clear on how or when to include the notification marked as "Is Group Summary". As I understand it, I need to have at least one notification of the group before I post the Group Summary. I'm using the Query function to look for one of the group notifications. Are there recommendations to determine there is only 1 message before I post the Group Summary? I've tried checking if %anid() is empty or %antext() doesn't match "group" but my results haven't been consistent. Sometimes I'm ending up with only the Group Summary notification showing up and no detail notifications. Thanks!