17TRACK Order Tracking

It's a brilliant app to track the package and upload the tracker into paypal, I used to work that with 2apps: Tracktor by ShopPad and MetaTrack, both are not free, now 17track absolutely saved my money. They have great customer service on wechat group, and the app have automatic emails to notice the issues on the package so we can catch it with our customers on time.
And the most important is they have Chinese language, it's much more useful for my China partners, highly recommend