There's a lot about how South Korea has handled this outbreak that I've been impressed by. Especially the app that alerts you to anywhere where people with confirmed cases have been. I think China had something similar.
I'm still seeing quite a lot of people who seem to think this outbreak wont affect them. I feel like if people were regularly getting phone updates to say their local shop, gym, workplace etc had been visited by a confirmed case then people would start to really feel like this is affecting them and respond accordingly.
I reckon it's probably too late for this particular phase of the outbreak but could help manage this over the longer term (along with a big increase in testing). It'd have to be developed and updated by the government / NHS though so it seems unlikely that they'll produce it.