I can build the best app for you. I have more than 3 years of experience in android development using RESTFUL and JSON in android. I am expert in both volley and retrofit lib. I am also expert in async task. I am perfect for this project.
Your app requirement can be implemented using content resolver I can write some custom classes to wrap content resolver for faster searching I recently did a project on same theme . Let's get connected .Let's get started :)