Don’t bother
I don’t know who wrote the other reviews but they must have been relatives. I have used many Morse trainers but this is the worst. There is a button on the bottom of the screen that says tap. When you tap it, it generates code (dots and dashes) and displays the characters on the screen. Only it gets most of them wrong. No matter how I tried to vary the speed and spacing, it got them wrong. My cw fist is pretty good and is easily recognized by other apps. There are three buttons on the top of the screen that are grayed out. I guess you have to upgrade to use them. The user interface is pretty useless. I couldn’t figure out how to get it to send practice code. The setup is very limited. It doesn’t provide Koch method training. Well, I could go on and on but you get the idea.