Surprisingly supremely satisfying app purchase of the year, verily!
I was going to leave this till later in the month, between Christmas and new year. But, I think it’d be to advantage to wedge it in about now instead.
One app. Don’t go listing a bunch of them, don’t even mention others that you forgot to mention, don’t mention others that you would have mentioned but didn’t because you can only mention one. Just one.
Which app did you obtain this year that you, perhaps much to your surprise, or perhaps you were expecting it to, but not this much, find that you’re using it a lot more than expected, and is more useful, and overall just more enjoyable, than any other you’ve partaken of this year.
 it could be that you paid for the app. It could also be that the app didn’t cost anything, or didn’t cost much, but you bought an IAP to expand the functionality to the level you found useful. I’m including this qualification because my choice fits into this sort of thing.