hello sir
I read your Requirement and I am sure I can help you with 100% quality work as We have done many complex App as well as web part so I dont think there will be any problem in doing this.
So can you please come to chat so that we can have detail discussion regarding it.
We are the IT company having 5+ years of experience in App and Web development, App and Web designing, backend, SEO/SMM cloud services, and enterprise solutions.
We have knowledge of Xcode IDE(Objective-C), Swift, Eclipse IDE, Android SDK, ADT Plugin, Java Programming, JSON, XML, Utility APIs, MySQL and SQL server database, super level UI design and much more.
please come to chat
Regards