https://thenextweb.com/syndication/2020/05/20/coronavirus-survey-reveals-what-the-public-wants-from-a-contact-tracing-app/

The UK government is currently trialling a contact tracing app among residents of the Isle of Wight ahead of a plan to roll it out across England. The app is designed to alert users if they have been in contact with someone who has reported COVID-19 symptoms and encourage them to self-isolate. But success will depend on the number of people who are willing to actually use it.

We conducted a non-representative survey of 730 people on May 11 – six days into the trial – which has thrown up some findings that could help work out what would convince people to use this app.