Inclusion Criteria:  Individuals (men and women) aged 18 years or older Biopsy proven (recurrent or metastatic) advanced lung or gastrointestinal cancer No limit on prior lines of therapy in the metastatic setting ECOG performance status of 0-2 Estimated life expectancy of at least 6 months Access to smartphone, tablet or computer with capability to utilize symptom tracking application Willing and able to provide written, signed informed consent after the nature of the study has been explained, and prior to any research-related procedures Willing and able to comply with all study procedures  Exclusion Criteria:  Concurrent disease or condition that interferes with participation or safety Non-english speaking, as the application is developed in the english language Non-castrate resistant prostate cancer Enrolled in other non-therapeutic or therapeutic clinical trials