Inclusion Criteria:  Patients consecutively admitted with a primary diagnosis of HF according to the Framingham criteria will be recruited. Eligible patients will be Chinese over 18 year-old, to be discharged home and living with family, patient/ family are using Smart Phone, and be communicable with the research team.  Exclusion Criteria:  Those who are awaiting revascularization, cardiac resynchronization or heart transplant, and those with end-stage renal disease relying on hemodialysis rather than HF medications, to regulate fluid volume, will be excluded.