NetSpot for iOS allows testing the Internet speed of the network you are currently connected to. It is a great option for those analyzing their network performance after they've done some tweaks to it.
The download speed measurement will tell you how quickly your device is downloading data from the Internet, while ping value shows how quickly a data packet sent from your mobile device reaches its target server (keep in mind that ping and latency values depend on the distance from the reference server to your device).
NetSpot is a first choice WiFi scanner and analyzer for iOS for a reason. With the extensive information it provides you can see the issues with your WiFi coverage and get on the way fixing such things as signal leakages or wireless channel overlap conflicts. You'll have the opportunity to improve the coverage, capacity, and performance of your WiFi network.