Mobile Passport Control represents the U.S. Customs and Border Protection's digital modernization effort for entry processing at designated U.S. airports and seaports. The application serves as an authorized alternative to traditional paper declaration forms, allowing eligible travelers to submit their biographical information and customs declarations electronically before approaching CBP officers. As an official government application, it operates within strict security protocols while maintaining compatibility with existing travel document requirements. The application's core functionality centers on creating passenger profiles containing passport details, travel itinerary, and customs declaration information. Users can store profiles for multiple travelers within a single account, facilitating family or group processing. The photo capture feature enables users to take compliant photos directly through the app's interface, though physical passports remain mandatory for verification. Upon submission, the system generates a digital receipt with QR code that travelers present to CBP officers at designated MPC lanes. User experience demonstrates thoughtful design for stress-free operation in busy travel environments. The interface employs clear typography, intuitive navigation, and minimal data entry requirements. Real-world usage patterns show most users complete their submissions while awaiting baggage or during arrival procedures, typically taking 2-3 minutes per traveler. The application maintains functionality without requiring cellular data at the inspection point, as submissions occur before approaching customs areas. User feedback consistently highlights exceptional time savings, with multiple reviews noting processing times under three minutes compared to conventional queues. Linda Lu's July 2025 review describes how '90% of the crowd went one way' while MPC users experienced rapid processing. Sylvain B's August 2025 endorsement emphasizes the setup simplicity and convenience, while cquille's June 2025 review acknowledges minor terminal identification challenges but overall positive experience. The consistent 4.9 rating reflects high satisfaction among the app's user base. The application's primary strength lies in its dramatic reduction of processing times at participating entry points, though limitations include availability at only select locations and eligibility restrictions for certain traveler categories. While the app doesn't replace physical passport requirements, it significantly streamlines the inspection process. Ideal use cases involve frequent travelers passing through supported airports like Atlanta, Miami, or Chicago O'Hare, where dedicated MPC lanes maximize time savings benefits.