Local authorities have been told about over 4,000 rough sleepers needing help, since the launch of the StreetLink service a year ago.
The app allows members of the public to contact their local authority about vulnerable people, who are then assisted by outreach workers.
Housing minister, Kris Hopkins, said: ‘Part of the reason StreetLink has been so successful is because the app and phoneline make it easy to help a person sleeping rough, not with a cash handout but with the valuable alternative of practical support.
‘Christmas is the season of goodwill, and as the cold weather kicks in, I urge anyone concerned about a rough sleeper in their area to download the app and get in touch with StreetLink.’
StreetLink is run by charities Homeless Link and Broadway with support from the government.