Long flight board games?

Looking for apps I can play on my phone without Wi-Fi connection. I’m incredibly introverted and don’t care at all about playing with other people— in other words, a Redditor. Anyway, I’m looking for good apps of good board games that can eat a few hours and don’t demand a Wi-Fi connection.

Sythe would have been ideal. I use the Spirit Island app pretty often. looking for others that work well.