A friend of mine was working on this exact thing about 2 years ago in collaboration with the NHS before Google pulled half their stack out from under them. Incredibly sad on the whole but glad that it's happening in some form.

Ah was it based on SpiroSmart at all? It's a smartphone tech Google purchased in around 2017 [0].

Yep, it has been tricky to get over the line as a medical device and used in the NHS, hence the focus more on wellness initially.

[0] https://www.healthcareitnews.com/news/alphabet-acquires-seno...