APPLICATION MAKER

I'm looking for an experienced and reliable application maker to develop an application for me that runs on both iOS and Android. I have a rough idea of what the design should be, but will welcome advice and creativity to make something unique and special. I am looking for an application with advanced levels of complexity and functionality. The app should have features like user authentication, in app purchases, push notifications, social media integration, and data analytics, but these features are for negotiation and further discussion. If you believe you have the skills and experience to deliver something extraordinary, I look forward to hearing from you.