This app was mentioned in 4 comments, with an average of 1.75 upvotes
I like this one. https://play.google.com/store/apps/details?id=com.microphone.earspy
This? https://play.google.com/store/apps/details?id=com.microphone.earspy
https://play.google.com/store/apps/details?id=com.microphone.earspy