No, the app is just an interface that lets you see what's happening and change the settings. All of the ongoing control of charging and data collection happens on our servers in the cloud.
You can install the app on as many devices as you wish, and can even have the app open on multiple devices at the same time.
If you uninstall the app from all devices this will NOT disable Charge HQ, because it will keep running on the server. For more information please see How do I stop using Charge HQ?
