The app supports encryption of recordings to prevent others from listening them. To activate this feature, first create a new key in Settings > Security. The key will be generated at random based on the password you enter. This means that no other key including those with the same password will fit for decryption of recordings encrypted using this key. Thus, both the key and the password are essential, and your recordings will be lost forever if you either lose/regenerate the key file, or forget its password. Please take care of that!

Once the key is created, you can check the "Auto encryption" box to encrypt all further recordings automatically after each call. Otherwise, you may use the context menus to encrypt individual recordings.