Nettest

Network Assistant is an application that integrates many network service query tools on mobile devices. Including obtaining basic network information, route tracking, Ping, viewing DNS information, whois and other services. It is a quick, easy and convenient assistant.
NetworkInfo, you can get basic network information.
Nslookup can be used to query DNS records, check whether the domain name resolution is normal, and diagnose network problems when the network fails.
Ping, you can check whether the network is connected, and it can help us analyze and determine network failures.
Traceroute, uses the ICMP protocol to locate all routers between your computer and the target computer.
Whois, through searching the domain name, can feed back the registration information of the domain name, including the holder, management information and technical contact information, as well as the domain name server of the domain name.
ipinfo, you can query the basic information of the current device public network.
iperf3, can be used to measure network bandwidth and network quality.