This study evaluates a mobile health (mHealth) home-based cardiac rehabilitation program for patients with heart failure. We will stratify randomization between rural and urban populations, with the goal to assess implementation of cardiac rehabilitation across these two geographic areas. . The study will randomize 332 patients with heart failure (ejection fraction ≥35%) who are not eligible for center-based rehabilitation to either a 12-week mHealth cardiac rehabilitation program or an attention control group, with outcomes measured over 6 months using a composite endpoint of mortality, hospitalizations, and quality of life. We will then assess the implementation of the intervention.