Notification pops up when the call is recorded. You can enable silent mode by disabling notifications.
You can rename or delete calls, filter, add to favorite or batch delete short records.
Please note: outgoing call record starts even an abonent don't pick up phone. Use batch delete to remove such short records (length is less than 15 seconds).
RECaller is an open sourced call recording app.
Find the source on GitHub: https://github.com/zlykh/RECaller