ByYourSide® is an Android app developed by Pfizer Inc. to help cancer patients and their supporters to connect, share, and receive support in one place. The app is part of the This Is Living With Cancer™ program developed by Pfizer Oncology. ByYourSide® is a free app that offers a comprehensive set of tools that can help cancer patients in different ways. Users can track their fatigue, mood, pain, and sleep, and integrate with other health apps and wearables to capture steps and sleep. They can also share personalized graphs with their friends and doctors. Additionally, the app provides tools to help cancer patients manage their health challenges, including connecting with loved ones, sending or receiving requests/offers for help with daily tasks, and adding all appointments and tasks to MyCalendar.