I could be wrong but it seems that none of these poker apps allow players to take part in freeroll tournaments. I know that some of these poker rooms run regular freerolls but you need to download the main poker client to take part in the tourneys? I think this is a major drawback of the existing poker apps. I don't have a huge amount of disposable income to play at real money rooms so I rely on freerolls quiet a bit. If someone developed an iphone poker app that allowed players take part in tournaments then I would happily sign-up.