Excellence: you can get an App for that. I've been playing drums and percussion for 43 years and still enjoy practising and performing rudiments. I believe they are the road to brilliance (and a great way to gather a crowd in a music shop, incidentally) and that calls for regular practice/repetition to develop muscle memory and neural pathways. Practice is most effective when it is enjoyable, and it is most enjoyable when the musician themself calls the shots. Step forward this App; nothing further needs to be said.
Can't help but publishing one of the best and nicest Rude Practice Pad reviews (so far):
What can I say but Thanks!