[oliver2213]

From what I've read, apple and google appear to be working on rolling out APIs for contact tracing on their platforms, and apps you explicitly install are supposedly just the first stage, with later in-platform functionality presumably to come with regular OS updates. So It might not always be a deliberate choice made by users in the future, for good or ill.

[AlanSE]

That sound really speculative. What exact wording did you see that makes you think this?

[tinus_hn]

No, the OS updates provide apis that apps that you voluntarily install can use. They don’t work on their own.