The iPhone 5S features iOS, Apple's mobile operating system. The user interface of iOS is based on the concept of direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons. Interaction with the OS includes gestures such as swipe, tap, pinch and reverse pinch, all of which have specific definitions within the context of the iOS operating system and its multi-touch interface.
The iPhone's minimal hardware user interface features five buttons. The only physical menu button is situated directly below the display, and is called the "Home button" because it closes the active app, accesses Touch ID, and navigates to the home screen of the interface.
The device maintains a similar design to the iPhone 5, with a 4 in (10 cm) LCD touchscreen, with a screen resolution of 640x1136 at 326 ppi. However its home button has been updated with a new flat design using a laser-cut sapphire cover surrounded by a metallic ring; the button is no longer concave, nor does it contain the familiar squircle icon seen on previous models. The phone itself is 0.30 in (7.6 mm) thick and weighs 112 grams (4.0 oz). The phone uses an aluminum composite frame. The device is available in three color finishes; "space-grey" (replacing black with slate trim), white with silver trim, and white with gold trim
It has screen resolution of 640 x 1136px.