What S The Best Voice Chat App For Android

I tried out so many. E.g. Tango, Skype, Viper, Line, KakaoTalk and so many others but all are more than I need. Because of Android’s terrible memory management I only want the App to run when I start it.

I do not want a background process.

I do not want it to run automatically when I don’t need it.

I do not want it to run when I restart the phone.

Also, I do not need any text chat..

… only a 1:1 voice chat and not a “press button to send a voice message” Application.

… and a “close program” and really kill the process