Ooh, Klondike Chromatic! Your favorite!

Mondo Solitaire packs 101 games (with tweakable rules for more than 200 total possibilities) into one $10 app. The graphics are smooth, the controls are easy to master, and the help is actually helpful.

Plus, Mondo can teach you about games you've never heard of. (Even a few games your octogenarian Uncle Morty isn't familiar with, we'd wager.) Xerxes? Miss Milligan? Swamp Drainer? They're all here. 

The landscape-view interface is nice, and you can pick a game from the menu by flcking through them in Cover Flow style. Or just tap the Surprise button in the menu and the game will pick a random mode for you to play. That's how we discovered our new favorite, Grandfather's Clock.