Is there a way to merge notifications

Nov 4, 2010
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I am using a Samsung Gs6 on stock Marshmallow OS. Is there anyway to merge notifications for 3rd party apps such as Drippler, Star Wars Card trader, etc? There isn't a option under Notifications either straight from the app or through the applications. I remember apps merging or just showing the most recent. Is there an option somewhere that I'm missing? A third party app I should try.
Thanks in Advance for Your Help

(PS I know one answer will be don't use those apps, but I still like Drippler)