If you register, you unlock all the features of the mobile app. You can print to any HP ePrint-enabled printer (to which you have been given access) from anywhere your mobile device has Internet access. You can also print Microsoft Office documents and Web pages, or save the Web pages to print later. HP ePrint Home & Biz even helps you with HP printer setup and lets you monitor the status of your print jobs.
If you choose not to register, you can still print directly to your supported Wi-Fi-enabled HP printer, but only when your mobile device is connected to the same Wi-Fi network. You can print photos, images, PDFs, and text files saved on your mobile device.
You can also scan from your supported HP device to the mobile app, or capture an image using your mobile device. The iOS version of HP ePrint Home & Biz also allows your mobile device to act as a driver to transfer files to your PC or Mac.