Inclusion Criteria:  COPD Be medically stable Ability to use a smartphone and applications (LINE and Youtube) Access to the internet Have visual and auditory impairments corrected with assistive devices  Exclusion Criteria:  Other respiratory disease as main complaint other than COPD Exacerbations within 4 weeks Had enrolled PR programs within the last 6 months Unable to follow verbal instructions, suffer from cognitive impairment, or have language difficulties Unstable medical conditions Any comorbidities which precluded exercise training