My attitude is maybe because an old school mate lost his life over the weekend so I'm not overly concerned if 007 is going to find out who I play golf with on a Saturday morning.
I'll not go into the extremely concerning issues over privacy, and how the really rather invasive data that this app will collect will be stored permanently, and for purposes that we're not being told about.
There is another very important issue here: the app won't work. There is a good deal of data indicating that as much as half those infected never develop symptoms - but can still be infectious. This app depends on self reporting - all these people will be missed. Furthermore, most of those infected will have a mild illness, so mild that they don't realise that they've caught CV19. These infectious people will also be missed. Indeed, evidence from China, California and Germany is indicating that 90% of cases are missed by the health authorities. This app will miss almost all CV19 cases. This is worse than useless, because this will instill a false sense of security. People will think that they're safe, because this app is telling that when in fact it's missing most infected people.
An app is no substitute for contact tracing, testing and quarantine for those who are infected. Yet that's exactly what this is being touted as! A contact tracing app of this nature would be of considerable use - if it were backed up by rigorous testing of those who exhibit symptoms, and then rigorous testing of those who've been in close contact (to pick up and quarantine the presymptomatic and asymptomatic cases). But even that does not replace the sheer hard work of conventional contact tracing, only helps it. Unfortunately, we're not doing that. We don't have the testing infrastructure. We don't have the contact tracing infrastructure. We're depending on this app (and on those who're alerted to do the right thing). That will fail, simply because it will inevitably miss most cases.