Health fitness and lifestyle app

I have a project that needs to be completed and I need help from a mobile app developer. The mobile app I require needs to be developed for both iOS and Android devices. Additionally, I have some ideas of what the app should look like but I need help to bring those ideas to life. Furthermore, I have a list of specific features and functionalities I would like the app to have. Therefore, I am looking for a mobile app developer who can bring my ideas to reality, develop the app for both iOS and Android platforms and incorporate my desired feature list into the app.