Normally priced at $6.99, the app gives users the ability to print a wide array of documents - from pictures in the Photos app to documents found in iCloud or Mail - to any Wi-Fi or USB-enabled printer. Readdle also provides a free-to-download desktop utility for the service that helps users with USB printers through an initial set-up and allows everyone using it to "print more document types and with better quality."
The company notes that to print a Safari page, users can change "http" to "phttp" in the address bar and hit go, immediately bringing up the desired web page within the Printer Pro app. Most other apps, like Dropbox, Mail, and Readdle's own PDF Expert, allow for a more streamlined process of accessing the app from a third-party app's "Open In" list.
Once installed, Printer Pro appears in the "Open In..." list on your device. This lets you print documents from Mail, PDF Expert and many other applications on your iPad that supports this function.The app has garnered a 4 star rating on the App Store, with one review calling it "indispensable" and many others praising its ease-of-use and high quality. Relied on by "over 2 million people", according to Readdle, Printer Pro [Direct Link] will remain free as the App of the Week for the next week.
Using "Open In..." approach you can print files from many popular online storages: Dropbox and Google Drive. It just a matter of several taps to download your file via free Dropbox or Google Drive application and send it to printer.