Small Customization & Upload, Install and Run (Web App, iOS App & Android App)

I purchase a script code (chat app) but I need:

-Change the background color/Home Display and app icons
-Add a new feature (Add Password for reading a message)
-Upload, Install and Run (Web App, iOS App & Android App).
-Delivered the finished script code

Note: I provided an Android developer account and Apple Developer Account.

Fixed Price: USD$30
Project Time: 10 days
Skills: Cordova, Ionic, Firebase, iOS, Android, html, Java Script JSON