Filza for iOS 12 and 12.1.2 jailbreak IPA released for recently announced RootlessJB. Here are the details on it.
FilzaEscaped for iOS 11.3.1 IPA download is now available. Gives full root access with no jailbreak being a requirement.
FilzaElectracuted is a fully functional Filza File Manager for iOS 11 Electra jailbroken devices. Here's how you can download it.