Cant create a label

Wish this app had ability to create and print shipping labels...cant be that hard to write the code...ebay app lets me create and print usps labels and thats great when i have an ebay order but what about when i get order through my website...sure would be easier to open an app and create/print instead of the 12 other steps i have to take

Performancespring about USPS Mobile®, v5.4