Plan, ride & connect with Alameda-Contra Costa Transit District (AC Transit), using the official mobile app for bus travel in the Bay Area in California. User-friendly features include real-time arrival predictions, mobile ticketing options, and direct connection to customer service. In addition, the AC Transit Official Mobile App can be used to locate bus stops, bookmark favorite lines, and submit lost and found details. Download the official mobile app today and enhance your transit experience with AC Transit.