Sp Camera [RECOMMENDED]
Position yourself so light hits your face, not the back of your phone. Even in "spy" mode, the camera needs light to avoid grainy footage.
If the app fails to record, check your iOS Settings to ensure "SPC" has full permissions for the camera and microphone. SP Camera
The app automatically generates thumbnails after capture to help you quickly verify you got the shot. SP Camera - App Store - Apple Position yourself so light hits your face, not