Any changes you make to your app or website, will be reflected in real time. The only updates that cannot be changed once you publish/build your app are :
1. Splash Screen
2. App Icon
3. App Name
To update these, you can subscribe to our add-on product called New App Version which is free of cost. Once you update the app icon, splash screen or app name, you will have to build then publish a new version of your mobile app on both app stores if your app is already live on app stores.