This study will develop and pilot a smartphone intervention, LiveWell, to enhance patient self-management of bipolar disorder and facilitate more efficient, timely care delivery by mental health providers. The intervention uses a mobile application to collect daily self-report and continuous behavioral data and adapts intervention content to create a highly tailored and user-responsive treatment system. Patient data collected by the phone will also be provided to clinicians to allow for better evaluation and targeting of treatment. The goal is to reduce symptoms and prevent relapse in patients with bipolar disorder.