I would be very interested for as many people as possible to test this and give feedback.
Particularly testing with different postures, hands, walking, different sensors etc.
Very simple to setup and does not require expensive hardware.
AWS is not value for money, I do have a DO account that is great but my development is mostly hosted locally with tunnels from cloudflare, it is remarkable how far you (I) can get with that setup.
I suspect that you used highly optimized algorithms written for python, like the vector algorithms in numpy?
You will struggle to write better code, at least I would.