All credit goes to
@jamny, but the JustWatch app is pretty slick - you tell it which apps/subscriptions you have, and it filters to just shows/movies on those services. You can set up a profile to keep your own watchlist and it makes suggestions based on shows you like. No more scrolling through the Prime suggestions only to find out I need a new subscription to watch something.
I only just downloaded the app but in playing around with it, got a suggestion for a show called "Inside Men" (insert dirty joke here) that is a 4 episode British show about a robbery at a cash counting depot. I'm just starting the 4th episode and have enjoyed it. I don't think I would have ever found this show without the app as it is from 2012, so not near the top of any of Amazon's lists.