Is this a real app?
Not sure if the app actually looks like that pic which I just pulled from the internet but yes there are some apps officially named safe neighbourhoods as far as I can tell for android phones. As for the iphone and other phone systems one would have to do more research. Here is a link for safe neighbourhood apps for android. http://appcrawlr.com/android-apps/best-apps-safe-neighborhood
There is a google-earth type site that overlays color-coded crime zones.
I wish I’d kept the link - can’t seem to find it now :(