Build small react cross native mobile app

App Flow: 1) Splash screen opens 2) After that user navigated to the login screen (username and password fields only), you can use any remote test URL as something to return true (JSON) if the username or pass true. 3) Keeps the session of the user until he logouts and sets its expiry max time possible. 4) Navigate user to the third screen where there is only one button when they click open camera to scan barcode and send that scanned barcode to any test URL Not to do Do not build app on top of the expo framework. But you can use its modules as native.