Trial of a digital asthma management application: juli

INTERVENTION: Use of juli app vs treatment as usual (plus attention placebo control app). juli app: Participants will be prompted to open the app each day via an automated alert. They will be asked to rate how they are feeling on a scale using 5 emojis and track number of shortness of breath episodes, rescue inhaler usage and night time waking with shortness of breath. The app will gather information via Apple HealthKit; sleep, activity, workouts, oxygen saturation. It will present this data to the participant and show associations with asthma symptoms. It will make recommendations about these parameters to guide healthy behaviours and will use external data sources (weather, air quality, pollen count) to guide these recommendations. The app has a medication reminder function that can be set by the participants to improve medication adherence. Participants are also encouraged to engage in journaling via the app, especially in relation to exacerbating or reliving factors for asthma symptoms. Attention placebo control app: Participants will be prompted to open the app each day via an automated alert and rate how they are feeling on a scale using 5 emojis. The participant will use the app for eight weeks and complete an asthma questionnaire every two weeks (four in total). Participants will also be asked to complete a well‐being questionnaire at four and eight weeks and a user satisfaction questionnaire at eight weeks. CONDITION: Reduction of asthma symptoms in adults with asthma ; Respiratory ; Asthma PRIMARY OUTCOME: Asthma symptoms measured using the Asthma Control Test at 8 weeks SECONDARY OUTCOME: ; 1. Asthma symptoms measured using the Asthma Control Test at 2, 4, and 6 weeks; 2. Short Form 12 Item health‐related quality of life at 4 and 8 weeks; INCLUSION CRITERIA: 1. Asthma with Asthma Control Test score<20 at baseline 2. Age 18 to 65 (inclusive) 3. English speaker 4. Have an iPhone