AN INTERNATIONAL, OBSERVATIONAL, BLINDED STUDY TO ASSESS THE PERFORMANCE OF THE CORDIO HEARO SYSTEM

Major Inclusion Criteria: 1. Age 22 or greater 2. Diagnosed with Symptomatic Chronic Heart Failure \[NYHA II-IVa (ambulatory)\] 3. At least one of the following: 1. One ADHF hospitalization in the last 12 months 2. One unplanned IV/SC diuretic administration in the last 6 months 3. Two unplanned IV/SC diuretic administrations in the last 12 months 4. NTProBNP \>500 pg/ml 4. Clinically stable HF according to investigator discretion 5. Willing to participate as evidenced by signing the written informed consent. Major Exclusion Criteria: 1. Unable to comply with daily use of the App, 2. Has had a major cardiovascular event within 3 months prior to enrolment. 3. Had a Cardiac Resynchronization Therapy Device (CRT) implanted or upgrading ≤ 1 month prior to screening visit. 4. Has estimated Glomerular Filtration Rate (eGFR) \< 30 ml/min/1.73. 5. Is likely to undergo heart transplantation/ LVAD within 6 months of Screening Visit. 6. Was treated for a significant COPD