This is a great app, it works just like the original Enigma that the Germans used in WW2. This also means it still has its weakness. A letter could never be itself; if this was fixed, I would give this 5 stars. This is a great app, works great. You can set it up they way u want on the rotors or the plugboard and get the Trillions different possibilities this machine has. If you are into code or ciphers, you should get this, and hopefully the developer will update to fix the weakness.
P.S. Also it could be nice to have numbers in their also.
Mozart1080 about Mininigma: Enigma Simulator, v3.0.1