Yes, it's a "Free" app, like the NES app. I'm not sure how they check to see if you've paid for your sub, since I was already a subscriber. Honestly, between this and the NES, it's an exceptional deal.
They also added a feature where you can "rewind" your gameplay. I'm not sure how long it's been available, but after I discovered it in the SNES app, I hoped over to the NES app and noticed it was updated with that feature too. So, this is basically a NES/SNES Classic built into the Switch. Not a bad deal, especially since it's mobile! Now let's just hope that next year they release a N64 download pak!
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~ Trading for a Bit of Everything ~