Spy feature: set the time and the recording will start automatically, even if the device screen is off.
Remote spy feature: start recording on a remote device and listen to it immediately with Google Drive upload. Turn your old smartphone into a bug.
Other features: trim silence to find immediately the sensitive content; schedule multiple recordings; export recordings to the external storage and Google Drive; disguise the app with generic notifications and protect it with password.

Listen to other people's conversations secretly. Check out unfaithful co-workers, cheating wives/husbands, your boss or friends' conversations, and find out what they really think about you. Also ideal for business negotiations.

PS. On some devices it might be necessary to exclude the app from the battery saving options in the Android settings.