Ionic2 or ReactNative English Curse in 15-20 Days

Ionic2 web application (working for ios and android) for english learning courses, simple interface with complete freedom on the design (themes/templates can be bought and used to speed up development). The first week we need to have advance in order to check the style and we expect to have everything finished in 2-3 weeks. We expect to have in the proposal in order to be considered a estimate in time, budget, and technologies, if you already worked with something like this please share. Content of the app will be provided at the start of the contract. The result Login with Facebook/Google: The user must be able to login with facebook and google, the information will be stored in a server. The POST call needed in order to save users in server. the call will add the user to the database and login, or only login if already existing (URL: /user, PARAMETERS (JSON): email,name,id_facebook,id_google, picture.) English Courses: The english curses need to be organized in levels: Easy, Intermediate, Advanced, Veteran. Each level consists in a number of lessons, the Basic and the Final. The basic give 10 points and all need to be finished in order to unlock the Final Lessons, that give 30 points each. The Basic lessons consists of a long video related to a STORY, that will be shown in 3 minutes intervals with question will be asked after each interval. After all the STORYS are finished, the Final Lesson is unlocked, that consists of another video, shown in intervals mixed with questions. We need to easily go back to see the video and navigate if we don't remember something. Also the videos must be saved locally We need to have 80% of the questions OK in order to pass a lesson. After each lesson, the result must be shown and saved locally (if each question is ok and the final result). Profile: We will show Picture, Name and Email. He can modify and save the user (calling a post method (URL: /user, PARAMETERS (JSON): email,name,id_facebook,id_google, picture.)) Rewards: We need to give a reward when the first points is made (after the lesson is finished a message needs to appear). We need to give a reward when level is completed: Easy, Intermediate, Advanced, Veteran. Logout: The user must be able to login in order to login with other facebook or google. May be you have to pay attention to create html5 video on android. If you have experience of using html video on Android, can you explain about that in interview? Thank you.