The United app offers access to your travel information at any time. Among the key functions of the United app is the mobile boarding pass. For expert travel planning, you can have your boarding pass sent directly to your mobile device by email or via the mobile app. You don’t need to print anything. As soon as you receive your boarding document, you simply scan the barcode on the screen at airport security and at the gate when boarding. In the event of a seat change, an upgrade or a gate change, your boarding pass can be updated accordingly to give current information (as long as your device is connected to the Internet). The United app also enables you to scan your passport when checking in for an international flight.