Speech Central shows the text, with a subtle colored vertical line displayed along the left side of the text of the paragraph as it is spoken. On iOS, the app supports the system voices, although you can adjust the voice pitch, as well as the default 1x speed to be slightly faster or slower.
It also supports the ability to read text from other formats, such as Word, PDF, and more. Speech Central works on more platforms than any of the other apps here, with apps available for iOS, macOS, Windows, and Android (although the app is available from Amazon, not the Google Play store). Versions of the app are available for Windows, macOS, iOS and Android. Speech Central shows the current paragraph being read.
