The app responds to voice commands. Say 'Camera' and the camera switches (front / back). Say 'Photo' and you will immediately take a picture and save it in the photo album. 'Selfie' takes a picture directly with the front camera, without first switching the camera. All of this is very fast and is very helpful if, for example, No hand free. At first start: please allow the access to 'camera', 'speech reg.', 'microphone'.