Crocodile tears

I’m a piano teacher and I use it all the time with my students. I don’t understand some of the negative comments. For the price, I find it a very dynamic and thorough tool for testing yourself and others. It Does have timers. I don’t understand when some say it doesn’t. It has a challenge mode. For beginners, you can set parameters on how difficult you make each challenge. I highly recommend it as a tool for learning music and testing your knowledge.