In honor of National Missing Childrens Day, the Federal Bureau of Investigation has launched a new version of the Child ID app, built for Android mobile phones.
First released in August 2011 for iPhones, the app allows parents to electronically store data about their children, such as height, weight and photos, for authorities to use if necessary.
Also, the app includes tips on keeping children safe and what to do in the first hours after a child goes missing.
The iPhone app has been downloaded more than 121,000 times.
May 25 was designated National Missing Childrens Day by Ronald Reagan, in memory of Etan Patz, a six-year-old in New York City who disappeared May 25, 1979, on his way to the school bus stop. He was one of the first missing children to appear on a milk carton.
New York City police officials announced Thursday that authorities made their first arrest in the 33-year-old case.
Police Commissioner Raymond Kelly said Pedro Hernandez, 51, confessed to choking the boy and putting his body in the trash.