I would love to do this project. I will require some more information though because if I take a project, I want to make sure that I can complete it and with perfection.
Since you already have your design, I guess it will eliminate a major part of development work. I provide 100% cashback (excluding the charges charged by freelancer website and bank) in case my work doesn't look satisfactory to you on first review of the app.
Hope to talk to you soon more on this project.