Inclusion Criteria:

• * Age 45 years or older
• * New York Heart Association (NYHA) heart failure classification of I to III that permits minimal physical activity without discomfort
• * have experienced HF hospitalization in the past 12 months
• * be fluent in English
• * Pass a mini-cognitive screen
• * Score of less than 2 (able to independently walk without using a cane or walker) on the Outcome and Assessment Information Set item for ambulation/locomotion

Exclusion Criteria:

• * severe visual (e.g., legally blind) or tactile (e.g., severe arthritis) impairments that adversely prevent the use of a smartphone or sensor devices;
• * a history of renal failure, which adversely affects HF prognosis
• * a diagnosis of an end-stage or terminal illness (e.g., cancer)
• * undergone heart transplantation, or implantation of a durable mechanical circulatory support device (e.g., left ventricular assist device) due to unique self-management needs.