Simple and works – BPM Counter - Find the beats Review

I actually don’t understand the reviews claiming this app is fake and doesn’t do anything. Did they ignore the instruction on it that says “tap me”? I’m an indoor cycling coach and needed an app to figure out the beats per minute for songs I want to use for my workouts for when I want people at a particular RPM range. This does exactly what it says.
Review by Agbagb on BPM Counter - Find the beats.