Android app for paid exams

Please read full description and then only bid for it. I need an Android app. I would like it designed and built. [:a:]Paid subscribers android app 1. Can give exam based on set of questions in random order with time defined by user 2. Can give exam with predefined set of questions with predefined time by administrator of app(Exam should have particular name) 3. Can search questions based on tags or content of questions 4. Can see results after exam with correct answer and description which is predefined by admin 5. Can see previous exams given by subscriber with full result and time spend on each question. 6. Each question will be of some subject so result can be seen on the basis of subject so subscriber can identify weak subjects. 7. Can see pdf or articles written by experts on the app itself. [:b:]Free Users: 1. Can search material(articles/links/embedded youtube videos) [:c:]Exams: 1. Exam can be for free users or can be for subscribers 2. Exam must be customizable with name, time, number of questions, weightage for the exam, number of questions. 3. Exam may contain any number of questions. 4. Exam must have year field. [:d:]Questions: 1. May be of Marathi language or English or Hindi (so unicode must be there) 2. MCQ questions 3. May contain Image or text or both. 4. Questions or set of questions can be based on some paragraph or Image. 5. Question must have tags so that admin can add any number of tags for that question. 6. Question must have subject that will be predefined by admin. 7. Question must have weightage/mark field [:e:]Options(Answers): 1. May be of Marathi language or English or Hindi (so unicode must be there) 2. May contain Image or text or both. 3. Answer will be only one option. [:f:]Users: 1. Anyone can create account with phone number or social media or email registration. 2. There should be different subscription plans Monthly/Half Yearly/Yearly.(Customizable) 3. Free users can access free material(Article/Images/Free Exams) 4. User should have suggestion box so they can submit suggestions if any. [:g:]Admin Panel: 1. There can be multiple admin users with different roles[full admin and operator which will add question, exams] 2. Can create exam with number of questions, which must satisfy [:c:] and each question having multiple options [:e:] 3. Can create articles free or paid 4. Can handle user subscriptions 5. Can see statistics of user visit, active users, active subscriptions, reports for all the parameters. 6. Should be able to send notifications or alerts from the app in notification bar. [:h:]Alert system: 1. User should get alerts for subscription expiration. 2. Admin should get alerts if system is down or if any problem with application. [:i:]Payment Methods 1. Payment gateway should provide all the available options.