Parcel, for iOS and macOS, is the most full-featured, easiest-to-use package tracking app available for Apple devices. Push alerts generally come faster than with other tracking apps, and the app syncs across all Apple devices and Parcel’s website. In some cases, when two carriers both use the same tracking number, you may need to select the correct one. The Deliveries app, on the other hand, requires the recipient to have the app installed to see what you share. Most package tracking apps are free to download, with an annual subscription cost of $5 or less.