I am not sure what you mean by cloud, but I assume you mean cloud computing servers. If you want to learn experimentally how much packet loss, you can just use ping tool like "ping 172.217.6.14 -n 10" to see the packet loss with round trip times. If you want mobile device to another server, there are mobile apps that do the same measurement.
I would recommend using iperf tool which gives you the functionality to run bidirectional iperf traffic between server and client with TCP/UDP and host of other options. It's a great tool to test the wired/wireless data link for throughput and latency.