TalkBack is an Accessibility Service that helps blind and vision-impaired users interact with their devices more easily. This application adds spoken, audible, and vibration feedback to your device. It comes pre-installed on many devices so you won't be able to install this if that is the case. It's only activated if you explicitly turn on Accessibility: <ol> <li>Go to Settings</li> <li>Select Accessibility</li> <li>Enable TalkBack checkboxes</li> </ol> For Android older then 8.0 use version 5.0.7_aosp. For Android newer then 8.0 use version 2021-04-23.