A relatively recent Google Play app, CSZfree, seeks to aid registrants in need of housing but bound by residency restrictions. These laws limiting where people on the registry can lawfully reside have been an increasingly popular measure to punish registrants. Over the past decade a number of states and localities passed legislation banning registrants from living near parks, swimming pools, day cares, schools, and other such places where children frequently congregate. The specified distance from such places varies from 500 to 2,500 feet depending on the jurisdiction.
Read more here.
Link to the CSZfree app