Hello,
My working strategy to launch an app is:-
1. Think about the functionality and make a list of features (either provided by the client or made by me through the provided idea).
2. Make mockups and describe all the screens (either provided by the client or made by me through the provided idea).
3. Implement creativity (As I am a professional Graphic designer)
4. Start the development (After the client's approval to the wireframes)
I work from the stage of designing to the stage of deployment including development, programming, testing and the development to the web part (backend). Hence, I assure you that you are at the right place where you will get the complete solution for your business!
Thanks