The National Cyber Security Alliance and Microsoft polled 804 US teen internet users ages 13 to 17 about their digital activities.
Facebook is the top mobile application for each age group.
Snapchat, Facebook Messenger and Kik Messenger attracted the largest shares of downloads last year among iOS users in the US.
Snapchat ranks as the fastest-growing social application by a fair margin, with its number of users up 67% between Q3 2013 and Q1 2014 (+95% among 16-19-year-olds).
Facebook remains the most commonly used social platform, with 56% of older teens claiming to have used it in the past month.