The best alternatives to KNFB Reader App are RatherListen, VanillaVoice, and TapTapSee. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Fit more reading into your schedule by uploading or pasting any news article, chapter, or work document into RatherListen and instantly get a listenable version to absorb while exercising, commuting, or doing chores.
This free text to speech tool will read out loud any text with a natural human-sounding voice. You can select several different voices including male, female, or child.