At the first I need a complete brief of what you need the Application for and your goals, and of course I'm gonna help to reach a better perspective of what you need.
then I need anything you want to put in your application such as your logo, any kind of photos, and finally text content.
I would be happy to see what's in your mind and it'll be helpful to see some inspirations.
After all of that I'm gonna sketch and get feedbacks from you to help me improve the design then I will start to design the UI.