The future of proselytizing—and surveillance—has arrived. An app called Bless Every Home, which has been backed by some of the biggest names in evangelical circles, is mapping the personal information of immigrants and non-Christians...

How Evangelicals Use Digital Surveillance to Target the Unconverted
The hot new thing in proselytizing is an app that allows Christian conservatives to collect data on whole neighborhoods of potential converts.
https://newrepublic.com/article/179397/evangelical-app-targeting-immigrants-surveillance