Probably my favorite game on my current app-ocalypse list is Battle for Westnoth.
It was developed as an open source project, so it is completely free on OS X, Windows, Linux, even BeOS for heaven’s sake. For some reason the iOS app cost $4 but well worth it IMO. It’s got an average review of 5 stars from over 300 ratings on the App Store and 9/10 on the reviews mentioned on the Wikipedia page.
It’s got lots of hex-based maps, quests, cool fantasy characters and artwork, and a good UI. You can tell it was made for the love of the game and not with money in mind.
I guess I’ll be trying to fill up my swear jar in time to buy a new iPad Pro and keep this older iPad on iOS 10 until the end of its days as many people have strategized on another thread. Bleepity Bleeping Bleep!