Smartphone apps in the COVID-19 pandemic - Nature Biotechnology

A comprehensive overview and attempt of reviewing all the COVID-19 smartphone apps. The authors discuss the limitations and give advice for future outbreaks. Although there’s conclusive conclusions.

Also, rather unfortunately Norway is referred to in the same sentence as Bahrain and Kuwait:

Amnesty International even called out Bahrain’s BeAware, Kuwait’s Shlonik and Norway’s first Smittestop contact-tracing apps as “endangering the privacy and security of their populations”

These really aren’t countries we want to be associated with regarding privacy and security.