how to create this type view i.e pdf view with page number when slide?the screen>/ also where to store pdf or file so that it can open within app with ads on horizontal arrangement below the content
It is possible to show pdf within app by using InApp PDF viewer extension but you can not slide it you have to swipe pages one by one and also ads can not be shown while reading pdf.
For 2nd image view: you can make it using any list view.
then how this app is developed
I think on Android Studio.
We can create apps on Kodular but there are some restrictions or limitations which can be overcame by using extensions.
So here, we can make pdf viewer app but we can not add more functions or features as available in apps made from Android Studio.
yess it is developed astudio