Indeed, and it's early days yet.
From the article:
> It also reveals that, whatever the people of Ireland have been told, their app is collecting centralised data on them.
The signup flow has a very obvious and well written opt-in for collection of anonymised data to help track how well the app is working, which was mentioned by the BBC article linked. I don't think people are being mislead.
I personally decided not to enable that, but did give the app my phone number to be shared in the event I'm a close contact.
> it has been in use, it is claimed to have resulted in 91 “close contact exposure alerts”, which is remarkably few.
That they know of, as those users either opted in to the anonymous tracking or (possibly) gave their phone number. It'd be useful to know how the install base per the usual Android/iOS stats compare with the anonymous tracking enablement, but those numbers haven't been shared as far as I'm aware.
Right now our overall case numbers are low enough (around 20 per day) that it's likely hard to tell how effective the app is. However our R is currently estimated at 1.1, so even a little help from the app could help keep us below 1.