**3. Accessible built-in features for visual impairment and blind**

There are built-in accessible features in smartphones that facilitate for all users regardless of disabilities or individuals' functional limitations. These accessible features enable a person with a disability to interact with the contents in the smart mobile phones [15]. A large number of accessible built-in features have been developed specifically for people with blindness and visual impairment. Few examples are highlighted in **Table 1**. These features have been preserved mostly on Apple iOS and Android operating platform, contributing more than 90% of the world smartphone market [16]. The most widely used built-in accessible feature as screen readers are TalkBack for Android (**Figure 4**) and VoiceOver for Apple iOS (**Figure 5**) among people with visual impairment [17]. The Talback feature allows the user to easily identify the content or applications icons on the smartphones'screen with a verbally speak words or voice from the device upon touching with fingers on the icons. By simply placing a finger on the icons, the smartphone will read aloud what icon is

