Re: Do it right from the start
"Projects and development are often run to deliver functionality and completion in the shortest cheapest possible way."
That is normally true. I believe the NHS is creating a product that would fall within the sphere of our FDA.
It looks like a consumer product, a smartphone, is being pressed into service as a medical device.
Over here such product development is a time consuming and extremely detailed/documented process.
Perhaps off-the-shelf cell phones don't pass muster in this particular use case.
I would have more faith in the tracking app doing its job if it's development were in hands of experienced programmers from a medical device background working for a well known medical device company. They have a habit of testing the hell out of this kind of thing prior to releasing it.
Google and Apple are not known for software or device products in the medical field.