What's the best Android app for tracking physical mail and packages from the post office?

USPS MOBILE® is the official mobile application from the United States Postal Service, designed specifically for managing mail and parcels. Its standout feature is Informed Delivery, which emails users grayscale images of letter-sized mail pieces destined for their address, effectively providing a daily preview of what to expect in the physical mailbox. For packages, the app offers real-time tracking with push notifications for status updates, which is invaluable for monitoring important deliveries or anticipating when to be home. Additional functionalities include calculating postage, scheduling package pickups, and finding nearby Post Office locations with current hours. The app has implemented more secure login methods, though some users note a recent shift that requires entering a password more frequently instead of persistent biometric access, which can be a minor inconvenience. Reviews indicate the service is highly reliable for residential homes, but its effectiveness can vary in multi-unit dwellings like apartment complexes, where mail may not always be scanned into the system. For anyone seeking to digitize and gain control over their postal mail flow, this app provides a centralized and authoritative toolset directly from the carrier.