Put your iPhone in speakerphone mode, get another iPhone or iPad and sit it down with the mic near the speaker. Activate a recording app on the other iPhone/iPad and converse away.
This is all assuming you are actually wanting to record a conversation. There are no apps that can do it by limitation of Apple. Assumed reason is privacy laws in regards to recording phone conversations,
buzzzz said:oh no.. I don't want to record convos. there's an app that streams music and I want to record from it