Nexus 7 (Gen. 1?) Phone Functionb

[Rabbit]

Having an "extended senior moment" when it comes to using my "7" as a phone.
I was sure that early on in my relationship with this toy I had an application that made using the tablet as a phone extremely easy.
I recall(?) being able to simply dial any number and talk away.
What ever the ap was, I no longer have it, or at least can't find it. 
Visits to the Play Store have turned up a few options, including tying in to Skype but all seem more complicated than what I recall.
Was I just dreaming or am I missing the easy solution?
If what I've written makes no sense, then Plan B would be to ask about your favorite phone option.
I'll be in Europe for a month with internet access but no cell phone.  (Too expensive.)   I was hoping that my remembered ap might provide an option.  No??
Thanks,
Rob  ;-)

[matt]

There were a few that used Google voice, but Google kiboshed using their servers for VoIP apps. May come as a hangouts update someday.

https://play.google.com/store/apps/details?id=com.talkatone.android
Sent from my Nexus 7 using Tapatalk

This one is transitioning to paid minutes after 20 free. I would recommend a Bluetooth headset so you don't get echo problems between the speaker and microphone.

Haven't tried it, any users?

[birdastrompgman]

I've been using Groove IP Lite, but it does rely on my previously established Google Voice number.