Build a mobile app in react native

I want to create a mobile app in Android/iOS using react native. It should have following screens/features: 1. Login screen via linkedin 2. Profile Screen * Get data from users linkedin profile but allow editing 3. Chat Screen * Disable chat if trial is over, trial is 30 days * Show a countdown that trial will be over in 5,4,3,2,1 days * Show notification if trial is going to be over in 5,4,3,2,1 days * Give an alert if user does not logs in or puts any chat message in 7 days * Send message, image, video, file 4. Progress Screen * Show the name of all stages, but show only stage details for next stage * Show a green tick for stages which are completed 5. Mentor Screen * Show mentor's linkedin profile Wireframe is attached. All pages of app must work in offline. All the data will be sent via REST API's over HTTPS. I have mysql/apache2/php on server side, you will have to write necessary code for that also to support the mobile apps full functioning. You will have to fix all bugs even after the development is complete. 10% of payment will be held back and released 30 days after the app goes live, to ensure any bugs are fixed within this time frame.