Mindrift is seeking native Korean speakers living in New York City for a 3-day in-person study in Midtown Manhattan on phone, app, and digital tool usage. Participants must be at least 18 years old, have grown up in South Korea using Korean daily, be comfortable communicating in English, and have used a smartphone for over 3 years. The role involves walking researchers through daily device habits, sharing activity examples, and completing a questionnaire.