Create an application for Android and iOS

Good day! I am interested in ios & android. The essence of the application: Testing (algorithm: A person undergoes registration, from which his personal identifier is formed, then pays for participation and undergoes testing). After that, the answer mask enters the database on a specific server.) We will provide the design and layout. The deadline is until the end of July. That's short.
What is the application:
1) Personal office. Description: Registration (name, email, age, social network binding, check box for processing personal data, phone, interests.) Payment (interested in the integration of payment in the mobile application.) Participation (We unload test tasks with a choice of answer or with the introduction of an exact value, and the participant undergoes testing) Result (after formation and verification, it is necessary to synchronize the database from the server, by identifier, to display the result in the LC)
2) activities (description of individual tests)
(3) Information (about us)
Also interesting are links to the site and social networks (preferably a built-in browser).