i need a application to working with android and ios

I am looking for an experienced developer to create an application that works with both Android and iOS. I have a design concept in mind so the candidate should be able to implement the design as it has been specified. My estimated budget for this project is between $500 and $1000. The developer should have strong knowledge in developing applications for both Android and iOS, as well as the ability to execute my design concept. The application should be user-friendly and have helpful elements such as documentation and tutorials that will help users understand and use the application. I am looking for a developer who is creative and able to think outside the box while still adhering to the set requirements.