Android app: Language learning and exam app

[Please READ requirements in detail first and then only put your best Bid and time. Don’t put placeholder amount and time. Won’t entertain such bids. No time wasters..] I need an android app for language exam preparation. It will have preparation materials, practice questions (in sets), mock tests interactive objects Question type: Text-picture-audio Multiple choice questions (different types of questions), different levels Time and free practice and mock test scores, performance analytics Word meaning Need php+mysql web backend. Api based. Code to unlock—online and manual payment Clean code + very attractive design Please include your android work portfolio with proposal [Budget 200-400 AUD —depending upon expertise, delivery date-best bidder chosen] Before you apply 1) Very IMPORTANT: Please read the description and make sure either you can do it in that BUDGET or not. If you think you cannot do it, please don’t bid. All the requirements have been posted. 2) Need who can complete the project on time and with quality. We take deadline seriously. Better if you have done similar app before (but not compulsory). 3) If you have any questions or need clarification, please ask before you apply. However, I may only respond to one who is interested in (I feel they can do it).