[5] Grier was a freshman at Davidson Day School when the mobile app Vine was released, a social media platform which allows users to post looping 6-second videos for others to view.

[9] As his popularity grew, Grier joined a newly formed group called Magcon (Meet and Greet Convention) in October of that year described as "a boy-band phenomenon without the band.

[10] Following the split, Grier moved to Los Angeles with fellow Magcon member Cameron Dallas to focus on his career.

[6] That summer, Grier joined DigiFest, a "social media tour" with thousands of attendees where personalities performed comedy and dance sets, Q&A sessions, and posed for pictures with fans.

[19] Grier and other members of his management have released mobile games and social media apps including Cash Dash, Mobli, and Challenged.

[22][23][24] BuzzFeed News noted "the backlash highlights the challenges brands face in working with today's new breed of celebrity in a supremely competitive landscape.

"[25] Grier's first lead acting role was in Fullscreen's The Outfield, which premiered November 10, 2015, worldwide on the iTunes Store.