How to view Jetson nano live video from Android OS device

I don’t have either experience with Android nor iPhone UDP client receiver, but if latency is not an issue, you may try to install VLC on phone. For UDP receiver you may have t create a SDP file telling the server IP, encoding and ports. Searching this forum you may find some examples. Then use VLC to read this sdp file and it should connect (as long that no firewall blocks some ports).

It may also be easier to use rtsp intead. You may check this.