How to detect latency or ping or can I detect connection if the device network is slow or fast?

[janpio]

My guess is that the only way to measure that is to make an actual request.

Note the time, make a request to a server endpoint that also returns the time, note the time when the response comes in - use all 3 measurement to do some calc for the roundtrip time. (Alternatively connect to any endpoint, do the calc with just 2 numbers)

[bradiosd]

The way I achieved this in our project (we are using Ionic 3.x by the way) was to check the API speed using a timer in an interceptor. Depending on how long the request lasts per request is our latency for that particular request lifecycle.

[jcesarmobile]

This is not possible with the plugin