'@larrygrylls Its a research project which isn't even supported by NHS England and used by only 3% of the population and those users are disproportionately young, female and of a higher socio-economic status than the general population.'
From their own site:
'The COVID-19 Symptom Study app has been developed by health science company ZOE and it is endorsed by the Welsh Government, NHS Wales, the Scottish Government and NHS Scotland. 3,911,738 participants have downloaded the app and are using it to regularly report on their health, making it the largest public science project of its kind anywhere in the world. App data is being analysed in collaboration with King's College London researchers.'
So, I make that more like 6% of the population-a very statistically significant sample!
And you are being somewhat disingenuous when you say it is not being endorsed by NHS England. It is endorsed by a lot of the rest of the UK. The reason NHS England did not endorse it is they wanted to support NHSX, the rather embarrassingly poor health service technology unit.
You might want to have a look at this Guardian article:
www.theguardian.com/technology/2020/jun/20/nhs-covid-app-developers-tried-to-block-rival-symptom-trackers
I am not sure how you know about the makeup of the users of the App, but the developers are well aware of their user base and perfectly capable of adjusting the statistics accordingly.
Why are you so against it?