The Irish Health Service Executive (HSE) has released a contact tracing app today.
They have published the source code to GitHub however, as the they have gone for a very transparent and privacy aware approach.
The uptake has been massive for Ireland as a result (~600k plus in only about 8 hours, approx. 12% of the population).
Just seemed like a brilliant implimentation that is very digestable for the public as it gives you choice at all steps.
Also they as much as say they need to keep an eye on Apple and Google in case they start processing data such that it wouldn’t be anonymous