The best alternatives to Speech Central are Pocket, elocance 2.0, and PitPut. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Speech Central?
AssemblyAI— Speech-to-Text API with superhuman accuracy
elocance is a mobile app that lets you save and curate YOUR OWN content, turn it to audio and listen on the go. Features include HD voice options and accents you can pick from, playlists, newsletters directly in the app, reminders for when to listen and more!