I get the sentiment and yes perhaps a personal application for this has some value to the individual. I do think however the risk of segmentation around this is

I get the sentiment and yes perhaps a personal application for this has some value to the individual. I do think however the risk of segmentation around this is real, if we all use different apps/platforms is there any value to it? For years I have and still do avoid a lot of cloud services, chat apps etc to ensure my privacy; but when it comes to this I strongly suggest we put our concerns aside and get behind whichever app/platform is recommended by our respective governments.