I'm building an iOS app (with plan user-base of 1) to help me structure my (I wish they were) weekly drumming sessions. My idea is to have "lessons" that have more "patterns" and I choose a lesson and practice those patterns logging the bpm's i can do (that 186bpm from your example is just wild for me). I am a beginner-intermediate so lots to learn for me. I use musical notation. If anybody interested in it let me know.