Move Together Boston Feasibility Pilot (Sit Less, Move More App for Black Breast Cancer Survivors & At-Risk Relatives)

The purpose of this study is to develop and test a mobile app for Black/African American breast cancer survivors and their relatives, called Move Together, that promotes sitting less and moving more for better health. This is a cross-sectional descriptive study using structured interviews and qualitative data analysis to develop an intervention, followed by a pilot test of the intervention with pre- /post- measures. * In study phase 1,involved qualitative interviews with 5 community leader key informants, 9 breast cancer survivors and 6 first degree relatives of a survivor. * This part of the research study is a Pilot Study, which means it is the first time that researchers are studying usability and acceptability of the Move Together app. * Participants in the pilot study will participate as members of family-based dyads (n=10 dyads). One member of each dyad will be a breast cancer survivor and one will be a blood relative * Study involves screening for eligibility, interviews, questionnaires, Use of Move Together app with Garmin activity tracker watch * Participation on the trial will be for 5 weeks * About 20 people (10 survivors with 10 relatives) will participate in this part of the study, and a total of 58 people in the whole study.