This application was designed for automatic tracking your parcels/letters that was sent via postal company "USPS" (www.usps.com). Main features: Automatic checking status and notification when status change. Scanning tracking number. Showing days in the way. Sorting parcels-Contains cute widget for homescreen. Material designWhen you got an error or hang etc. please contact me by email with full description: your device model, android version and how to reproduce it. Also please send me your ideas, questions and concerns.