[Q] Loudspeaker app topic

Hi guys,

Im new to Android and the Play store so I really need your help, I remember seeing an app that does the following:

When you place a call it automatically turns on the Loudspeaker as long as the phone is ringing and when the other party answers gets the phone back to the normal speakers.
This is different than the SpeakphoneEX which uses the proximity sensor all the time to switch the loudspeaker on and off.

Thanks alot for your help