I have a website in Shopify,2 years back I have installed Shipway.in to my website.The most interesting fact is they keep on updating their app with some new features. Comparing to the pricing I did not find more reasonable pricing than this.
AfterShip - AfterShip is the shipment tracking API for ecommerce businesses and marketplaces.
TrackingMore - Trackingmore is a parcel and courier tracking tool.
Parcel - Blazing fast, zero configuration web application bundler
TrackChecker - TrackChecker is powerful software application for tracking delivery progress of your shipments, parcels, packages, air cargo, etc... tracking number, parcel, postal services, package, delivery, monitoring
OneTracker - OneTracker – Package Tracker is an app by OneTracker Team that helps users track all their delivery vehicles and staff to increase the productivity of their delivery business.
Deliveries Package Tracker - With "Deliveries" for Android you can keep track of all your parcels at a glance.