Ayoub Bensakhria

There are many websites that provide with templates to do that. I've found a simple one : https://www.makeareadme.com You can make your own Readme file in less than 10 minutes.

Hit  Command+Option+Escape  from anywhere to bring up the simple “Force Quit Applications” window, then click on the app name to select, followed by clicking the “Force Quit” button, this will end the app immediately. Source :  http://osxdaily.com/2012/03/02/force-quit-mac-apps/

For  android  one can use  CTRL  +  R For  apple  one can use  R  +  R  (two times  R ).  For developers options: One can also use the  Command⌘  +  D  keyboard shortcut when your app is running in the  iPhone Simulator , or  Command⌘  +  M  when running in an  Android emulator . Debug JS Remotely. Source : https://stackoverflow.com/questions/38039736/how-to-reload-in-the-default-android-emulator-for-react-native-app