Latency depends upon the geographical distence. In different cases the latency may be different. For minimal latency you have to deploy you server at minimal distance from where your app is running. We have two solutions
AppWarp: In case you are uning AppWarp cloud solution AppWarp cloud server is deployed on multiple geographies that you can choose via AppHQ console. e.g. (US, IRELAND, JAPAN)
AppWarpS2: In case of AppWarpS2 user itself deploy server. So for minimal latency user has to choose server location at nearest geographical location from app.
hope this will help you.