Inclusion Criteria:  Male or female, aged ≥18. Diagnosed with COPD, 30%< FEV1 <80% predicated, or FEV1>80% and FEV1/FVC < 0.7 Discharged from the hospital during the last 3 months due to AECOPD. Provision of signed and dated informed consent form. Speak, read and understand either Hebrew, Arabic or English. Able to understand study requirements and comply with study procedures. Able to operate a tablet for SG measurement.  Exclusion Criteria:  Suffer from any physical or cognitive impairment that may affect subject's capability to operate the SG device properly. Pregnant woman or nursing mother. Severely ill with less than 12-month life expectancy Suffering from serious uncontrolled medical conditions that may interfere with study requirements. Participated in another clinical study during the study period, that may interrupt their participation in this study.