Great content. Not too user-friendly.
I really love the app. It has been extremely useful for me while learning muscles. I'd like to see it more "learning-friendly". For now, it seems better if you want to check something specific about a muscle rather than learning. For example, you can swipe between the muscle images but not the muscle cards which tell you the origin and insertions, making it rather hard to go through the whole list of muscles one by one. Also during quizzes, tapping should allow you to go directly to the choices of answers, instead of making you wait for 2 seconds when you are sure of the answers. If these things were added, it would be a lot more user-friendly and I'd definitely give it 5 stars.