And there is even a fork on F-Droid that works without google framework only requiring microg, working on older devices, and having some minor additional featur

And there is even a fork on F-Droid that works without google framework only requiring microg, working on older devices, and having some minor additional features: https://f-droid.org/packages/de.corona.tracing/ https://f-droid.org/packages/de.corona.tracing/