Inclusion Criteria:  adults ≥ 18 years old; patients with documented acute myocardial infarction, treated with thrombolysis, angioplasty or revascularisation surgery; patients who own a mobile phone with internet access; patients who have at least completion of primary school education; understand English or Malay language; patients who will return home for living after hospital discharge; patients who are medically stable and referred to CR programme and able to give informed consent to participate in this study.  Exclusion Criteria:  patients who are participating in other studies; patients who will undergo any repeat cardiac or other procedure in next 12 months; patients with comorbidities such as dementia, impaired hearing or vision or psychiatric illness which may affect the ability to participate in the CR programme; patients with pre-existing mobility problems which prevent them from exercising