The feature was not available for Android users in the meantime. When you receive a call, new text message, the speaker will speak the caller name or sms sender name. For Marshmallow and Nougat users: Remember to give the application privilege to access your phone. Also double check your phone text-to-speech feature.
You are able to get the .apk installation package of Caller Name Speaker, Speak SMS 2.1.0 for free and take a look at users' reviews on Droid Informer. This file size doesn't exceed 4 MB and the app can be launched flawlessly on Android 4.0 and above. The security report reveals that this application is completely safe. Caller Name Speaker, Speak SMS is developed by Unidroid and its category is Tools.