Arm 1, group A will receive standard respiratory outpatient care such as routine virtual visits to the respiratory clinic at 6 and 12 months along with the use of a smartphone app self-management programme with follow up monthly phone calls. They will be asked to use the spirobank spirometer (measures lung function, FEVI), pulse oximeter (measures oxygen saturations, SP02) and input the dyspnoea score (m MRC), step count and view the educational videos on the app twice a week for twelve months. The smartphone app self-management programme will prompt the patient once a week to remind them to input their data. Furthermore, they will receive motivational messages weekly via the app. At the routine visits they will complete questionnaires on engagement, quality of life, m MRC scale and self-efficacy at these visits over the phone. They will inform the research team of self-reported GP visits or hospital admissions due to an exacerbation of COPD.

Those allocated to the intervention groups B will receive standard respiratory outpatient care such as routine virtual visits at 6 and 12 months to the respiratory outpatient clinic along with the use of a smartphone app self-management programme. They will be asked to use the spirobank spirometer (measures lung function, FEV1), pulse oximeter (measures oxygen saturations, SP02) and input the dyspnoea score (m MRC), their step count and view the educational videos on the app twice a week for twelve months. The smartphone app self-management programme will prompt the patient once a week to remind them to input their data. Furthermore, they will receive motivational messages weekly via the app. At the routine visits they will complete questionnaires on engagement, quality of life, m MRC scale and self-efficacy at these visits over the phone. They will inform the research team of self-reported GP visits or hospital admissions due to an exacerbation of COPD.

The intervention in this trial is a self-management programme via a smartphone app. This self-management programme measures lung function (FEV1), oxygen saturation (SP02), dyspnoea score (m MRC) and step count. It also provides educational videos such as recognising symptoms of an exacerbation and physical activity. The smartphone app self-management programme will provide real time data monitoring resulting in baseline trends in patient's disease pattern. Additionally, it also provides subjective data that will allow the clinician to develop an understanding of the patient's quality of life.

The number of COPD self-reported exacerbations reviewed by the GP versus the hospital. COPD exacerbations are defined as an acute event described by a worsening of the patient's respiratory symptoms that is beyond normal day-to-day variations and leads to a change in medications (GOLD 2020). The primary outcome will be assessed by the research team at, three, six and twelve months using a patient self-reported approach.

Engagement defined as a psychological state that embraces the dynamic and interactive relationship with a principal agent or object (e.g., a brand, product, or smartphone app) that satisfies the instrumental (utility) and pragmatic (emotional satisfaction) values of a consumer (Bowden 2009, Brodie et al. 2011). This outcome will be assessed by the research team at 3, 6 and 12 months using the, user engagement scale short form (O'Brien et al. 2018). This scale consists of 12 questions which the researcher will ask the participant to strongly agree-4/agree-3/disagree-2/strongly disagree-1. The overall engagement score will be calculated by adding all of the answers together and dividing by 12. The higher score indicates high levels of engagement.