MR - Background Media Recorder description
MR allows you to record video/audio in the background without showing any preview. It can record media through a button on the app or through the volume keys. You can select the source camera, set vibrating notifications, and the length of the recording. You can navigate through your phone and use other apps without interrupting MR recordings. You can use the volume keys in order to start/stop a recording even if your device is locked or your screen is off.