Mobile operating systems
Generally, the smartphones and tablets utilize a gesture-based lock-screen. The mobile phones manufactured by Neonode that included the feature to unlock with the help of swiping to the right on the phone touchscreen. Until iOS 10, the iPhone and iPad lines used Apple’s iOS, and a similar mechanism, an on-screen slider slid to the right to unlock the phone. In the early on iOS 5, if a user slides in another direction, it launches the camera app directly. As part of a larger overhaul of the iOS, the slider widget was removed on iOS 7, and now users could swipe to any direction of the screen.
The lock screen typically shows a notification, clock and offers audio playback controls. iOS 10 replaced the sliding gesture with pressing the Home button, which made major changes to the lock screen. To access the camera in phones, swiping still in use, including another page to the left with widgets. In iPhone X and iPad Pro, the user needs to swipe the upper side from the bottom of the screen, as they have no physical home buttons.
Initially, the Android users were required to press the phone’s Menu button as Android did not use a gesture-based lock screen. A new gesture-based lock screen was introduced on Android 2.0, including two icons: setting the volume mode and unlocking the phone. The rotary dial was replaced by two tabs on either end of the screen on Android 2.1. A new design, a ball with a padlock icon is dragged to the outside of a circular area, was introduced by Android 3.0.
Android 4.0 offered the option to unlock straight to the camera, whereas 4.1 unlock into a Google Search screen by dragging up. Android 4.2 allowed users to add widgets to access the pages on the lock screen with the help of swiping from the left edge of the screen. Additionally, Android includes a feature to be locked a device by using a passcode, password, a pattern on a grid of 9 circles, facial recognition, or fingerprint sensing. Typically, Android distributions use different lock screen designs by other manufacturers that what stock Android uses. Some versions of HTC’s Sense used a metallic ring to unlock the phone; this ring had to drag from the bottom of the screen to unlock the phone, also allowed users to access applications directly by dragging their respective shortcut icon.
Unlocking the Samsung devices, like Samsung Galaxy S III and S4, the lock screen can be dragged in any direction. Similarly, HTC’s lock screen, applications can also be launched directly by dragging up from the bottom of the screen. Some applications may hijack the default lock screen as they may contain adware. Additionally, the non-lock screen applications were officially had banned by Google Play Store from monetizing the lock screen in November 2017.