What is Reddit's opinion of Linear Grooves?

From 3.5 billion Reddit comments

For staright up sitting by your kit and practicing I found Linear Goove to be very useful. The ability to randomize a linear groove is a great way to keep you on your toes.

https://play.google.com/store/apps/details?id=com.appotica.lineargrooves

this one, I don't think it allows you to share stuff though (which I really don't care about anyway, I use programs like these only for practice)