Kingdom Island Forums

This may not be a great topic to bring up, considering it talks about Kingdom Island competition, but I am just curious what other virtual world apps are out there in the App Store? I would say a large majority of users play Kingdom Island after downloading the free or HD app... and many even tell me they are testing virtual world apps out to find which one they like the best. Aside from the Club Penguin virtual app, are there really a lot more? I personally feel like Kingdom Island is unique in this way, but who knows... maybe there's a whole list that I am just not aware of. However, who really cares... tons of players join each day and a good portion of them stick around