What's the best iOS app for managing and previewing my physical mail?

USPS Mobile® is the official application from the United States Postal Service, designed primarily to provide users with visibility and control over their postal mail and packages. Its standout feature, Informed Delivery, digitally previews grayscale images of the front of letter-sized mail pieces scheduled for delivery that day. This is particularly useful for individuals in apartment buildings with shared mailboxes, remote workers, or anyone who wants to monitor important correspondence like bills or documents before they physically arrive. Beyond mail previews, the app consolidates key USPS services: users can track packages with detailed updates, schedule package pickups, calculate postage, find nearby Post Office locations, and purchase shipping labels. Reviews indicate high satisfaction with the mail preview functionality, with users noting it helps them verify delivery and occasionally catch misdelivered items. However, the Informed Delivery service is not available in all areas, and the image previews are typically for automated mail, not catalogs or large envelopes. The interface, while functional, can sometimes feel dated compared to more consumer-focused shipping apps. For a free tool that centralizes mail management and package tracking from the national postal service, USPS Mobile® delivers significant utility for daily mail oversight.