Hello there,
As per your job description, we can build a mobile app including all your requirements.
We are fluent in required technology.
We have knowledge of Xcode IDE(Objective-C), Swift, Eclipse IDE, React Native, Unity 3d, Android SDK, ADT Plugin, Java Programming, JSON, XML, flutter, Utility APIs, MySQL and SQL server database, super level UI design and much more.
Please message us for detail discussion.