These games are very enjoyable at those times when you are out of a network, or simply do not want to enable your data package. However, there are still many great free offline games for iPhone and iPad that can be played without an internet connection. Because most of the time these games, mainly available for free, offer in-app-purchase to buy gems, upgrades, etc. Phones require wireless Internet or cellular data to run games with multiplayer features and interact with or against friends.
Most of the multiplayer games can’t be played with friends in offline mode.