iPhone app Update Vs new version

Question

Let\'s say I have an existing IOS app live on Appstore which is version 1.0

Now I make some changes to the app and want to submit back.

Are there 2 separate

Answer 1

You must always increase the version number of any update to your app.

Users will see a badge on the App Store icon on the device, and in iTunes on their PC. Going into the updates section, it will list your app along with the list of changes you've provided, and a button to install the update. They can also update all apps at once.