You could be right JenniferEccles, although I think quite a lot of people will want to do the "right thing" because there's pressure to do one's "civic duty".
Personally, I'm not too bothered that the government is going to spy on me, although the technology would be in place for it to do so, if it wanted.
I'm more concerned that it won't actually stop infection and people will be lulled into a sense of false security. As lockdown eases, people might think that the app will help them and they might become too relaxed about social distancing. People will still be infected (with all the horrible consequences for some people) and some of the contacts will still be infected too. I'm struggling to believe that people will take a warning text seriously, so they might ignore it - or it could go overboard and warn people who aren't in any danger, who could then self-isolate for no reason.
I've also been reading about whether the app will actually work. Apparently, most modern smart phones, especially Apples, turn themselves into background mode to save battery power after a while. Unless people constantly reactivate their phones, the alerts won't work. I don't pretend to understand the techie stuff, but apparently Android phones take longer to turn themselves off and a critical number of Android users is needed to turn the Apple phones back on. (It doesn't make much sense to me, but that's what techie people are saying.)
I really can't see this app as an alternative to the advice we're already supposed to be following about social distancing, not touching your face, washing your hands, etc. The worst case scenario would be if people become complacent. I fear that the government might see it as the one and only answer and ignore all the other measures which need to be taken.
From a totally personal point of view, I really don't want to be infected. For me, there's only one course of action, which is to stay isolated until there's a vaccine. I know that could be a year and I'm resigned to that. I've tried to make my life as pleasant as possible and keep my business going. I spend hours every day on social networks (Zoom or Skype mainly) and it's OK. There are even some advantages, such as not spending money on fuel and not having to associate with people who annoy me
. I'm buying fresh food from local suppliers, which is expensive, but I do notice the difference in quality and might even stick with them in the long term. I make a huge effort not to waste anything because I value it more. I do online yoga lessons with my former teacher.
(Sorry to digress.)
My point is that, having considered it, I can't see the app would benefit me and I can't see that my not having it would benefit anybody else, so I won't download it.
Anyway, off to bed! I've even noticed I'm getting more hours of sleep, which is good.