Here are the steps to use a screen reader and text-to-speech on an Android, iPhone, PC, and Mac.
Android:
Go to Settings > Accessibility > TalkBack. From there, you can go into TalkBack settings to adjust things like speech rate and pitch. Alternatively, you can tell Google Assistant to turn TalkBack on.
iPhone:
Go to Settings > Accessibility > VoiceOver and turn the setting on. Alternatively, you can ask Siri to turn VoiceOver on.
PC:
Here are the steps to use a screen reader with a PC.
Mac:
VoiceOver is a built-in screen reader that describes aloud what appears on your computer screen: it speaks the text that’s in documents and windows. To turn on VoiceOver, press Command-F5.