The study aims are to (1) develop and refine Unwinding Anxiety for individuals with generalized anxiety disorder, (2) determine user engagement and acceptability as well as measure effect sizes of the program vs. treatment as usual, and (3) preliminarily test mechanisms of action. The knowledge gained will set the stage for a number of future studies related to further elucidating the mechanisms of mindfulness, and the clinical efficacy and utility of this type of training delivered via digital therapeutics in general. Specifically, this study will provide necessary variances for powering larger phase 2 studies.