I hopped onto the steam store webpage, genuinely expecting it not to work. But it absolutely does. It displays if the game is on a subscription service, and also when it doesn't, which was the main kick to write a review.

Edit: absolutely do go have a look at the developer's webpage (it's in the permissions). And definitely make a contribution if you can!

Thank you for existing in my life!

Does what it's supposed to and does it pretty well.

does, what is expected and does it in CLEAN, nice, unobtrusive way.
a relatively rare treat with today's developers.

Strongly suggested for anyone that buys on Steam (as I have for 16 years), even if you do not currently have GamePass or any other subscriptions. You would be *shocked* at how many big games are available on these services.