There are many sites that offer online games, one of which is casinoapps.net . Which ones to use mainly depends on which casino game apps that you would like to play and at what casinos. There are a wide variety of games that are available, from the basic ones like blackjack and roulette, to the more complex slot games which are proving to be increasingly popular.
The online casinos realise what a lucrative market the iPhone market is and it is often the case that they design and distribute their own apps to encourage people to sign up and play.
There are also a variety of apps geared towards the fun end of the market on which many games can be played without any money being involved.
Poker apps also belong in the casino genre and these are appealing to a wide range of consumers due to the increasing popularity of Poker and this appeals to people of all ages. The apps of this nature can be quite complex and some of them offer different techniques to enable users to improve their game play.
There seems to be improved versions of these apps being released on an almost daily basis and each one seems to be more advanced than the last and due to the nature of the game this trend looks like it will be continuing into the future.