We live in a rural area and UPS GROUND is our preferred carrier. We will cancel orders if FEDEX is the carrier because of the constant problems. The app worked great till last update. Now it lost my login, when I try to edit data it says account already exists. I can't reset or leave instructions for driver. I must enter tracking number every time. It's easier to check merchant app for delivery info than UPS. Now it wont load. A good company with a poor app developer. Unfortunate.