Originally Posted by tvos
please advise and thank you
I thought that using the Google Voice app would give you the option when making calls to "Use Google Voice for every call, Don't use Google Voice to make calls, or Ask me each time." If I remember right, when you use the Google Voice app to place calls, the service calls you first. Once you answer, it then places an outbound call showing your GV number.
GrooveIP works purely over data (WiFi, mobile data) and definitely uses your GV number.
Don't be afraid of the "Thanks" button