Good thread on “contact tracing” apps to slow spread of COVID. Spoiler: thread suggests you need 60% of a population to use it for it to work, aka: 150M+ DAU in USA. Only a handful of apps already have this scale & new app would have to “go viral” faster than the virus itself. https://twitter.com/marcelsalathe/status/1246352109936803840">https://twitter.com/marcelsal...

If you’re working on an app like this, please reach out as @Foursquare tech can prob help (we have the tech, we just don’t have the scale). That said, I’m skeptical of the “if you build it, they will come” nature of a new app that’s gonna need 60%/150M+ DAU to be effective

And I think the *worst* thing that can happen is we have 5 “contract tracing” apps all trying to “win” and having none of them sharing their data with each other. So if you’re working in this space, please don’t do that. https://abs.twimg.com/emoji/v2/... draggable="false" alt="👍🏼" title="Thumbs up (medium light skin tone)" aria-label="Emoji: Thumbs up (medium light skin tone)">

One more thought (sorry!): Yes, “contract tracing” ship has sailed for spring 2020... but we’re gonna need an app like this before we get back to normal (summer/fall/winter 2020) so get in the headspace that something like this is gonna be in our lives: https://twitter.com/dens/status/1246102306845790208?s=21">https://twitter.com/dens/stat... https://twitter.com/dens/status/1246102306845790208">https://twitter.com/dens/stat...