This is Google's screen reader which is built-in to many phones. It's worth getting the latest version from the market to gain the latest improvements. Some special scripts are included to improve access for some popular third-party apps. Get the Accessibility Preferences app to adjust Talkback's few available settings. TalkBack is an app for the Android Accessibility Service to help blind and vision-impaired users use their devices more easily. This app add spoken functionality services to your device. This is a system application that was pre-installed on most devices and is updated when the accessibility service is improved.

This app only gets activated if you explicitly turn on Accessibility.

Steps to activate Accessibility:

1. Go to Settings
2. Select Accessibility
3. Enable Accessibility checkbox
4. Enable the TalkBack checkbox