The study aims to assess the differences between spirometry performed with the NuvoAir Air Next spirometer in the clinic setting with both direct and virtual supervision via a video call, and in the home setting with virtual supervision. This is will be achieved by comparing lung function values, specifically the FEV1 and FVC measurements. We also wish to evaluate participant's perceptions of home spirometry, by using a survey.

This is a multi-centre, cross-over study. The study will enrol participants with a diagnosis of asthma and COPD, across participating study sites until 68 have completed the study.

Inclusion Criteria:

• An ability to provide fully informed consent.
• A diagnosis of asthma or COPD.
• Male or female aged ≥18 and ≤ 80 years of age.

Exclusion Criteria:

• Symptoms suggestive of COVID-19.
• An exacerbation of asthma or COPD or symptoms of a respiratory infection within the 30 days prior to the first visit.
• Any other clinically significant medical disease or uncontrolled concomitant disease, that is likely, in the opinion of the Investigator(s), to impact on the ability to participate in the study.
• The presence of any contraindications to spirometry.