This Android app Scans the entire gallery in android mobiles and detects Human faces and store the faces in a separate folder. The detected faces will be saved in DCIM/FaceDetectionGallery It will takes hours to complete the job based on the number of files and size of the files this app doesnot run in the background. you have to run this only during your free hours. put the mobile in chared mode. the screen will not shut off and dont shut off the screen.