app developer

Hello, I am looking for someone to develop an app with a utility-driven purpose that is intended for both iOS and Android devices. The development of the app will need to be done according to a rough design idea that I have. The ideal candidate for this position should have a portfolio representing previous experiences in mobile and software application development. If you have the experience that I am looking for, I would love to see your proposal for this project so I can make an informed hire. Thank you for your time and I look forward to hearing your ideas. AND me talking: It is a mathematical app which calculates 5-7 variables e.g. interest rates, inflation etc. using different inputs.