Intervention of Attenuated Psychosis Syndrome With M-Health Technology

The investigator will conduct a pilot study of 80 APS subjects (age 18-45). The investigator will examine SMART feasibility and user engagement using a randomized control trial research design. Using a simple random method, 40 APS subjects will be randomly assigned to the experimental group to receive add-on SMART intervention for 3 months and 40 APS subjects will just get naturalistic treatment with no SMART intervention. At baseline and 3-month follow-up, subjects will complete questionnaires on app use habits and attitudes towards SMART feasibility and engagement. In-depth interviews will be conducted at both time points to cross-validate the findings obtained from the questionnaires.