Can I use HP Ink Tank Wireless printer without HP Smart app in iPhone?
Though HP Ink Tank series printers are not in Apple's AirPrint supported printers list, you can still use the default print option available in app’s setting. For Wi-Fi Direct, switch iPhone's WLAN to printer's Wi-Fi network which will have the name "DIRECT-*". This will show the printer for selection and after printing you need to switch back to default network for using internet connection.