Google Talkback is an accessibility service for blind and visually impaired users created by Google.
The application is pre-installed on most Android devices. Google’s Android devices especially have the service installed as part of the application suite.
It uses spoken word, vibration and other audible feedback to let users know what is on the screen as they use it.
Google Talkback provides audible and vibration feedback so that users can fully interact and engage with their device.