Author Contributions
This study was conceptualized by V.A. Study methodology was developed and agreed upon by all authors (V.A., M.-Y.C. and J.S.). J.S. is the developer of the Vocal Function Exercise program. Data collection was completed by undergraduate research assistants, V.A. and M.-Y.C. The app building was completed by M.-Y.C., with feedback from V.A. and J.S., V.A. and M.-Y.C. were responsible for data curation; specifically V.A. for the clinical trial and M.-Y.C. for the usability data. All software for statistical analysis are provided through the University of Kentucky. Instrumentation for voice measures were provided by the Laryngeal and Speech Dynamics (LSD) laboratory; J.S. is the director of the LSD lab. Data analysis was completed by V.A. and M.-Y.C. Funding for the project was acquired, with V.A. as PI and M.-Y.C. and J.S. as co-investigators. V.A. carried out the majority of the supervision on the project. V.A., M.-Y.C. and J.S. were responsible for the original draft. The integration of the material was completed by V.A., with contributions from all the authors. Writing and editing following the original draft was completed by V.A. All authors have read and agreed to the published version of the manuscript.