Many professionals need to consume dense written material hands-free, but existing TTS apps handle novels better than textbooks or legal docs.
Specialize in clear pronunciation of technical terms, with adjustable speed controls optimized for comprehension of complex material.
Law firms, medical students, and researchers would pay for accuracy that saves them time and reduces eye strain.
Start with PDF support for one professional domain (e.g. medical journals), using open-source speech models.
Risk: Device limitations may constrain voice quality compared to cloud solutions.