Flutter-based Android App

I'm looking for a Flutter developer to create a simple Android app for me. The app will do the following:
- Provide a field for the user to input their API key, which will be saved in local storage.
- On initialization, the app will start listening for phone calls. When an incoming call is received, the app will send the caller's phone number to the specified API.

Additionally, the app should allow the API key to be edited by the user at any time.

Ideal skills for this project include:
- Proficiency in Flutter and Android app development.
- Experience with local storage implementation in mobile apps.
- Understanding of call listening permissions and APIs in Android.
- Able to create user-friendly interfaces.