I was a strategy advisor to Riot Games (League of Legends) and Lead Designer on Evony Age II (most profitable FTP MMO RTS) so I know exactly what's required to create a successful game.
My studio has many years of deep experience in developing mobile games and apps, especially for Android and iPhone. If you could please share more information with me I can provide you with a more accurate estimate of the effort involved. Please check out my portfolio for more information, or feel free to get in touch with me to discuss your project needs further. I look forward to potentially working with you :)