Wont work with phone microphone

Dont get this app. In its current state at least two of my iphones cannot be heard when placing calls. I tried calling a Georgian phone number after buying credits. The phone call was like 48 credits a minute and 100 credits cost $2. This is NOT IN ANYWAY A FREE CALLING APP AS DESCRIBED.
You can watch 30 second ads to get a SINGLE credit.
This MIGHT be useful for very short calls but again it DOES NOT HEAR THE MICROPHONE and the loved ones you are probably trying to call wont hear you and hang up wasting lots of your time or money. This app so far is obviously a money grabber and to be truthful seems like a scam.

Couzin IT about HiTalk - International Calling App, Texting, WiFi, v3.1.2