In 2026, the most reliable and officially recognized app for putting your passport on your phone is Mobile Passport Control (MPC), which is authorized by U.S. Customs and Border Protection. This app allows U.S. citizens and Canadian B1/B2 visitors to create a digital profile with their passport information and submit their customs declaration digitally upon arrival at major U.S. airports. While it does not replace the physical passport—which you must still carry by law—it provides a digital shortcut that often grants you access to a dedicated, faster line at immigration. For those in the European Union, many member states are rolling out Digital Travel Credentials (DTC) within national identity apps. Additionally, the Apple Wallet and Google Wallet apps now support "Digital IDs" and passports in a growing number of jurisdictions, though these are primarily for domestic identity verification or TSA checkpoints rather than international border crossings. Always remember that a "photo" of your passport in your camera roll is not a legal travel document and will not be accepted by airline gate agents or border officials.