Mininigma: Enigma Simulator!

Mininigma is a complete simulator of an Enigma Machine for your iPhone/iPad/iPod Touch. As of version 4.0, Mininigma also includes a Custom Keyboard Extension (iOS 8.0 and newer), to use it from any app on your device, for instance, sending a mail, messaging, etc. You can even copy/paste machine configurations in an encryptable string :)