Half of adults age 18-24 in the United States who own smartphones have installed the Snapchat app, according to recent data from comScore.
That's a significant increase in usage compared with the same time last year, when just 30% of 18-24-year-olds were using Snapchat.
Use of the mobile messaging app has also spiked with older Millennials, age 25-34, with 20% now using it—up from around 8% last year.
Usage among non-Millennials, adults age 35+, has not increased at the same rate, remaining under 10% for the past year.