Mobile Application Development

We are provide services English speaking courses and need to develop mobile application - We are looking for an app in which below mentioned details should be there 1. Any one download App Free and after register they get 5 lessons free and after 5 lessons student Buy services or pay course fee. payment gateway integration module. 2. Sign in and register through mobile number and get OTP on mobile. Student Fill profile details after mobile verification. 3. Translations of Hindi sentences in to English for which data will b given by us..And That translation need to be done on voice command compulsory or other option would b typing...But it will b time consuming as v need very speedy translation ... 4. Search of required Translations which is not there... So we can help to our students either by uploading that in our database . 5. Live chatting facility..Live call facility for instant translation...Which would b at premium.. 6. Practice module ,quiz,test of translation...At different stages or levels should be there.. 7. Students sign up is reqd....And module for grammar lecture s also reqd.. 8. Voice record facility. Voice or speech recognition, speech recognition test. Speech Test and assessment uses voice recognition to assess the students’ recordings and to analyze which lessons they should study to improve their pronunciation. 9. Subscription Module 10. Refer a Friend and share app and get reward module. 11. Powerful Admin panel where we can upload questions / test module / result details or related app info. This is the basic thing what we are looking for...If you can add on something then please let me know