Yes, I've had to delete my most played IOS game, Wurdle. It doesn't run on IOS 11 and the developer has never updated it. It was a remarkably simple game, finding as many paths on a 5x5 grid of letters that formed words in two minutes.

It was the perfect way to pass the time while standing in line, and with practice some people (like my wife) could get almost supernaturally fast at finding words (I could never beat her). Sadly, there is nothing quite like it on the current App Store.

To be fair, it was an inexpensive game and I got a lot of use out of it.