The price will depend solely on where you will order your application and what properties it will have. And here is the next question, what do you need in order to order? For this you need only a good and proven company that is engaged in the development of applications. In our case it is the company Leobit - leobit.com/blog/mobile-app-development-process-ho… . I have used their services more than once and have always been most satisfied. After all, they employ the best experts in their business, who care about their clients and very easily adapt to any order. I hope that I was able to help you)