That looks great, thank you. Just a quick Q in case you are aware: any apps/services that can help me formulate and do (daily) exercises about fixing a straightened lumbar lordosis?

Yes! Honestly, I don't know. I haven't seen a raw demo outside of the website itself. From initial looks, it looks a little bit jittering and...slidy? Idk if they're playing around with the EMA smoothing but I can't fairly assess it without more examples from them. Sorry, I can't give a fair answer to this question. But thank you for sharing!