Screenshots of STAMP + CBT app intervention. From top left: app home screen, example pain survey EMA item, example negative thoughts survey EMA item, end of survey summary screen, and stoplight background colors for JITAI feedback and message examples (green, yellow, and red); second line—content examples: breathing relaxation, text with visuals, two 2D video screens, one of the 2D behavioral games, and the homepage for the resource library