A two page app. The first page is language selection and the second is 100 questions on a single scrolling page...when the question is clicked the answer expands downward and becomes visible.
Having built multiple apps on my own and with a team and for emerging startups to Fortune 500 firms I can say with utmost confidence that your price and quality will vary greatly.
A simple basic app could be delivered to you for under $2000 or you could go spend over $20,000 working with professional user experience designers and developers.
Let me know if you would like to talk - Evan@EvanLuthra.com