Simple solution:- In your code, Just measure the time you are spending downloading data from server. This will give you a rough idea of how the network is performing. Use this measurement to compute a metric that you can show to the user. Like you can say average response time = XXX... or you can show a green/orange/red light on the UI
A little more complicated solution: -
Setup a timer that pings a server periodically, and checks how long it takes to get the response. This will help you get an idea of how the network is doing
Much more complicated solution:
Network throughput is really determined by 2 things latency and bandwidth. TO get an accurate idea of the throughput,
you should be measuring both. Since, you don't want to invest too much time in a solution, you might want to stay away from this
