SimpleVoiceRecorder

'SimpleVoiceRecorder' is made for the purpose of creating life-log record, the remarks in a meeting, and prevention of various types of false accusation.

This is very simple application.
This app runs as a service by pressing to "start recording", and it will continue to record the sound of the outside always even when the display is turned off.

While the battery is not empty, you can record the the sound of the outside by this app eternally.

For example, if the train is very crowded, the crime is likely to occur.
In the worst case, YOU might be mistaken for a criminal.
This is NOT the best self-defence. But this is a very simply and easy self-defence for every Android user.

From the "Advanced", You can change the recording time for individual files and number of the file to be saved.