With respect I think I have a reasonable understanding. The aim...

With respect I think I have a reasonable understanding.
The aim of the RAP app seems to be a simple screening test, from which people identified as potentially having OSA would need to go on to further evaluation, including looking at the range of medical causes for OSA (and not just leap to CPAP anyway).
The RAP app, if proven to have good sensitivity and specificity in the double blind study, could be a useful clinical tool, but only for initial screening. I doubt very much that anyone is going to commit to a lifetime of OSA treatment and expense based on the findings from an app, without a thorough medical evaluation.
But, as I said in the previous post, anything that raises awareness and diagnosis of OSA will lead to more CPAP machines all round, including for RMD.