Yeah, I mean there must be thousands of live routine of dumb bells from highly experienced trainers at NYC exercise studios. So 50-100 dollar a month service for a gamified dumb bell routine wouldn't be outrageous at all.
I don't know of anyone who has figured it out yet, but some dumb sensors (accelerometer, camera) plus some smart AI (pose detection, rep counting, LLM-based motivational phrases) could go a long way to creating a trainer that's 80% as good as the best human trainers.
Got a great idea, gotta find some kinda brainiacs to code the app