I am currently a game developer with SEGA Networks, Inc.--the Western division of SEGA's mobile development arm. I am a veteran game developer with more than a decade of game dev experience, and have experience with iOS, Android, and Unity in particular. My name can be found in the credits of Marvel Puzzle Quest for both iOS and Android, which has been downloaded by millions, as well in the credits for Pulsen, a rhythm and music game which was published to Steam last year.
I'm looking to find additional game development part-time, outside of work, and so I can certainly take on this job for you. Realistically, Unity can be used to create the app you're looking to build, but the entire project will need to be defined in more detail. Please follow up if you need additional information. I have experience in delivering large projects successfully for high-profile clients, as well as developing large game engines and server-side code. I do seem to be a perfect candidate for the job.
Thanks, and all the best,
James