Create a mobile application for Android and iOS

Need a developer of applications for mobile devices for Android and iOS. You need to create a rather complex mobile application to monitor the robots of promoters.
The application is needed for both android and aios.
I will try to describe the essence of the application in stages:
1 The promoter is registered in the application using mail, password and an information code;
2 After registration and confirmation of mail, it can be logged in to the application and you need not forget about the function of access restoration;
3 After authorization, the application must determine by its location in which city it is located and if it changes its location, the application must automatically switch to the new city;
4 At the first call, the user must create his electronic signature and indicate his name and age;
5 When the city has been determined and the account is filled, you need to pull up available advertising campaigns for his city from the base of our site;
6 The promoter selects from the list an interesting campaign and applies for participation in it, indicating how many leaflets / business cards he can distribute;
7 When the application is submitted, it is awaiting approval, approval is carried out on our website, when the approval is received - the user must see the agreement, he must sign it with his electronic signature accepting all the conditions for the terms and rules of the advertising campaign;
8 When the contract is signed, it is given the opportunity to download the source cards, as well as a list of the most profitable centers of seals;
9 He should further note that he has submitted a request to print business cards and attach a photo of the receipt for payment when the business cards are received - a photo of all business cards and the next step;
10 Now the promoter has buttons start, photo, stop and confirm execution - when he goes to the area to distribute business cards - he presses the start and the base records his coordinates every minute, and also starts the timer, after 15 minutes he should take a panoramic photo of the area where he gives out business cards, then restarts the timer again, when he finishes work, then presses the stop;
11 When all business cards are distributed, the whole batch, he presses "confirm execution" and all his work data are sent to us;
12 When the work is confirmed by our moderator, he is charged a payment on the balance sheet, or the reasons for which his work is not accepted are indicated.
This is a brief description of the upcoming project. The project is a pilot, so we can not offer much for creating an application, but we can draw up an official agreement where we will prescribe conditions that if the project begins to bring profit, we will pay you the full agreed cost of the application, and also, if everything goes well, there is a high probability of employment for a permanent job, both remotely and in the office.