[oh_sigh]

Unfortunately we can't do fine grained permissions like that on any common smart phone OS. You'll have to either take their word for it, or decompile the app and make sure they are telling the truth.

[tedunangst]

On iOS, the status bar turns red whenever an app uses the microphone. Unless you think they are jailbreaking the phone.

[oh_sigh]

Even if the app is running in the background? Sorry, I don't use iOS

[xrxrxrx]

challenge accepted

[oh_sigh]

Well, how have you fared with this challenge?