Dear Sir/Madam, Hope you are doing well. Greetings from SPEC India. We have gone through and studied your post that you are looking forward to build a professional work relationship for enhancement in your app, which is already up and running. Here, as the app is already development, our developer would have to first study the existing code, then study the modifications that you want to make with the system, and then alter the code as per the requirement. So, we recommend to take this project on hourly basis @16USD. Let me know your best time to have the conference call between you and our technical manager. Thanks.
Kind regards,
SPEC India Team.