Hacked? City has an app for tha at

The city will offer a free app this summer that warns smartphone users about suspicious activity on their devices.

The initiative, one of the first public actions by the NYC Cyber Command unit that Mayor de Blasio established last year, will identify malicious attacks and issue warnings when a mobile device is in danger of being compromised.

Rather than take action, the NYC Secure app advises users to navigate away from a Web site, disconnect from an infected Wi-Fi network or delete an infected app.

“We took an expansive view of the definition of public safety and said, look, if people’s identities are going to be stolen, their money’s going to be stolen, their lives are going to be disrupted, we need to reach in and protect them,” the mayor said at a press conference in Chelsea.

He said the Cyber Command separately will require all city agencies and affiliated providers to beef up protections for pub- lic Wi-Fi networks across the city.

The programs will cost roughly $5 million a year, the mayor said.

Officials stressed that the app will not access or collect per-personal information.

The announcement of the initiative comes a week afterer the city of Atlanta was hit with a ransomware attack that knocked some of its municipal systems offline.