We aimed to observe the effects of a self-management mobile app for patients with schizophrenia. A mobile app was designed to record and remind users to take medication and some daily activities. The patients were asked to use the app for one month. Before starting to use the app, and after completion of one month, the patients were assessed by some psychiatric scales. Twelve patients completed the study. The mean number of automatic reminders per patient was 918/month or 29.6/day. The mean entry number per patient was 158.4/month or 5.1/day. The numbers of daily recorded activities showed a decreasing tendency over time. The pre-study PANSS score was 16.2±5.8 (meanÂśSD) and the post-study score was 14.9±6.9 (p=0.040). The pre-study FROGS daily life skills score was 20.3±3.8 and the post-study score was 19.7Âś4.1 (p=0.012). The results suggest that a mobile app may be helpful for patients with schizophrenia.