the author of this app says:
You don't need an expensive Nixon for this amusing feature any more! You don't need either to be PhotoShop master to have this picture.
By ImageMixer, take several pictures and mix them to have a new amazing unique picture.
By ImageMixer pack your memories in one picture!
By ImageMixer create art pictures!
By ImageMixer create funny pictures!
To use ImgaeMixer, following permissions are needed:
1. Storage: to store images on SD Card
2. Hardware Control: to access to camera and taking picture
3. System Tool: to prevent phone from sleeping while processing images