The BERN: Official Bernie Sanders 2020 App is an Android-based social and communication application that offers a platform for users to volunteer for Bernie Sanders's presidential campaign. The app provides various features, including hosting campaign events, finding and contacting friends, and exploring the issues that the campaign is addressing.

The app has a user-friendly interface, making it easy for users to navigate through the platform and find the information they need. The app also has a feature that enables users to create events and invite others, making it easier to spread the word about their campaign's events. Additionally, the app provides resources and information on the issues that the campaign is addressing, helping users stay informed and up-to-date.

Overall, the BERN: Official Bernie Sanders 2020 App is an excellent tool for volunteers who want to get involved in Bernie Sanders's campaign. The app provides a convenient platform for users to connect with others, host events, and stay informed on the issues facing the campaign.