NEW YORK -- Snapchat is now out with an update to its app -- which lets photos disappear shortly after being posted.
The update comes after a security breach last week that exposed the phone numbers of millions of users.
After the breach was revealed, Snapchat had promised a more secure version.
The security flaw let hackers collect the usernames and phone numbers of 4.6 million users of the site, which is popular with teens.
Also, for the first time since the breach, which occurred New Year's Day, Snapchat is apologizing for the security hole.