This study included new users self-reporting migraines when registering for a publicly available DMHI (Happify) between 10/27/2020 and 1/14/2021. Every two weeks, users were prompted to complete a mental health assessment, including a proprietary measure of subjective well-being and the 2-item Generalized Anxiety Disorder scale. Starting on Day 3 and every two weeks thereafter, users were also prompted to complete a 7-item migraine assessment measuring stress, fatigue, sleep quality, migraine frequency, migraine severity, interference in daily activities, and migraine-related helplessness. We examined changes in outcomes between participants’ first and last assessment, controlling for time between assessments, using the subset of users who completed at least two mental health (n=694) or two migraine (n=652) assessments.