Build me a Dog Walker connection App

The project we are looking to make is an application. The app we are looking to make will in the long run hopefully be able to be available world wide but for the initial testing period we are looking to test its applicability in the UK. The idea of the app would be to ease stress of households within the UK that have dogs. The app would be a sort of connecting service between people willing to walk dogs for a fee and people who want to have their dogs walked. When opening the app it should be simplistic with only an option for requesting a walker within the area, an option for payment method as well as an option to sign up to become a walker in your local area. The time of arrival and the current location of the walker should be shown from the time a walker is requested until the end of the job. The app should be almost identical for users who are paying and those who are walking except for the direction the payment is going. Fees and decisions regarding the business aspect should not be worked but left blank. We essentially want a connecting app with a simple design (preferably mostly white with blue text), connecting users with dogs to dog walkers within the area. The app name is Request-A-Walk. The attached file what we envision the opening page of the app to look like. Thank you.