Additional Study Information: Many patients with metastatic cancer experience frustration with the large number and complex scheduling of their medications. This study will help us find out how much pill burden exists in patients with advanced cancer, and how a smartphone app can help patients take their medications as their providers prescribe. Results of this study may help us figure out the best way to help patients manage their medications in the future. Cancers include bladder cancer, brain and spinal tumors, breast cancer, colon and rectal cancer, esophageal cancer, gynecologic cancers, head and neck/oral cancer, kidney cancer, leukemia, liver cancer, lung cancer, lymphoma, skin cancers, multiple myeloma, pancreatic cancer, prostate cancer, sarcomas, stomach cancer, testicular cancer, and thyroid cancer.