What is the difference between Omniverse Kit App and Omniverse Code App?

Hi everyone! What is the difference between Omniverse Kit App and Omniverse Code App? And what is Omni kit App? kit UI is similar to composer app. In generally I know omni kit app is used for creating my own app/extensions. But What are the main features that distinguish them from each other? What are the UI differences?

You mean USD Composer and Code ? They are both examples of an Omniverse Kit App.
USD Composer is our main app for most general 3D workflow.
Code is an app specifically to help develope kit code and extensions. However, both are possible to be used in both ways. I would always go with the LATEST version. I think Code is a little older than the lastest version of Composer.