“Reduce Motion“, or Parallax effect was entered by Apple with the launch iPhone 6, iOS 7, and this effect creates the impression that Screen's image is 3D. This effect is possible by moving the background image behind the text and icons, depending on the position in which we hold the iPhone. It gives us the feeling that the background image is in the depth of the screen, and the text and icons are somewhere above.
Tot aceasta functie raspunde si de efectul paralaxat la inchiderea aplicatiilor sau la deschiderea si inchiderea folderelor de pe iOS. Ecranul face zoom atunci cand deschidem si inchidem foldere sau aplicatii, pictogramele si imaginile de fundal se deplaseaza putin in functie de cum miscam dispozitivul iPhone, iPad sau iPod Touch,
It is not known exactly how much battery and how many resources do these consumes visual effects of iOS movement, but it is certain that not everyone wants these effects.
How can we activate and disable “Reduce Motion” on iOS – It disables reducing the movement of background images DIO effects on the iPhone, iPad and iPod Touch
The function “Reduce Motion” or “Reduce movement”, you have the accessibility setting of iOS. So, we go in Settings > General > Accessibility > Reduce Motion > Turn On.

After activating this option, you will notice that the zoom effects when closing and opening an application have disappeared. As well as the movement of the background image. But the effects do not disappear. When opening and closing applications or folders, the zoom effect is replaced with a fade effect.