The study will be conducted as a prospective, observational, open labeled, randomized trial in a single center (Taipei Veterans General Hospital). After screening, the enrolled patients will be randomized to either routine care or Smartphone self management group. In the routine care group, the patient will be treated as routine practice as a real-world setting. No additional intervention will be done. In the Smartphone self management group, an asthma self management Apps (My asthma App, GlaxoSmithKline, Chinese version, or Line), which provides multiple function, including health information (real-time weather condition, air pollution index) at the point-of-living, personalized health assessments (asthma control test, peak flow rate) and interactive action plans (green, yellow, and red light), and regular reminding for controller administration, will be downloaded to the participant's Smartphone. The participant will be educated to operate the Apps to improve asthma control. Participants in both groups will use identical controller (Sal/flu 2 inhalations twice daily plus as-needed rescue ventolin) and will be scheduled to follow up for 24 weeks.
