Can you tell me how big apps can i build?

How big apps can i build?
I have an app i am building on with a screen where i make pages in Verticalarrangement. But how big can i make it?

Technically, you can build fairly large apps, but there is a bit of a balancing act. App Inventor is not really built for huge, complex apps with dozens of screens and heavy media assets. If you try to do everything on a single screen using lots of VerticalArrangements (like simulating screens), you might eventually hit performance issues especially on lower-end devices.