Using Google Voice Without Simcard This is a simple question but I couldn't find the answer in this website?

Is is possible to call phones without a voice plan just using Google Voice?
You can do this with an app called GrooveIP: https://play.google.com/store/apps/details?id=com.gvoip

I have it on my OG Droid, which is no longer activated on VZW, and use it as my "house phone" with my Google Voice number.