This protocol is a single arm pilot study of a novel breast cancer navigation app that is intended to assist patients with breast cancer understand their diagnosis and treatment options (both as part of standard of care practice and clinical trials) and manage their care, through treatment and symptom tracking. Patients will also be able to share information and get news via the app relevant to their cancer subtype. Results from this intervention will inform future clinical integration efforts, improve patient-centeredness of such an app-based health content and data platform, and inform the design of a larger, randomized study to demonstrate an improvement in patients' outcomes as well as enhanced Real-World Evidence (RWE) data collection.