Brogue[1] is an acclaimed roguelike that follows in the tradition of substantial procedural content for that genre, and exists on IOS[2], at least. You might find others at: [3]

[1] https://sites.google.com/site/broguegame/

[2] https://itunes.apple.com/us/app/brogue/id613921309?mt=8

[3] http://forums.roguetemple.com/index.php?topic=3697.0