Remote Monitoring and Symptom Management Digital Application

Inclusion Criteria: 1. Age 18 years or older 2. Ability to understand EnglishLanguage 3. About to begin definitive systemic treatment (or within 4 weeks of beginning treatment) based upon the oncology treatment intent form for a new diagnosis of breast cancer, colorectal cancer, or lymphoma. 4. Expected treatment duration of at least 12 weeks 5. Own or willing to receive a smartphone Exclusion Criteria: 1. Cognitive impairment that would interfere with ability to use smartphone application (as assessed by their attending physician) 2. Visual or motor impairment that would prevent smartphone use 3. Expected survival less than 3 months