Best defense game for the iOS – Four Days: World Defense Review

Well, the title says it all, it's hands down the best defense game for the iPad, I have not tried the iPhone version. I wish that there was an opportunity to pay for upgrades or to pay for the app and do away with the ads, although the ads are not too intrusive or annoying. This game is a must have!
Review by The original PR0T0C0L on Four Days: World Defense.