Showbox for iPhone and other iOS devices once was freely available in App Store but due to some restrictions and issues it got removed from Apple’s official App Store.
As for now, unfortunately it’s too complicated to get original Showbox iOS app installed and running on iPhone or iPad, but there is a new app for iOS devices that is literally Showbox version for Apple’s iOS and it’s called MovieBox.
MovieBox for iPhone
To get MovieBox on iPhone, iPad or iPod you have two options: Jailbreak your iPhone and install it via Cydia market fast and easily or…
If you don’t want to Jailbreak your iOS device there is another way, you can download TutuApp market which doesn’t requires Jailbreak and can be installed even easier than Cydia. After getting TutuApp on your iPhone you can easily find and install MovieBox on your iPhone.