For some reason, after I installed many apps (because a company made them free Apr 27 to 29), and then, the icons don't appear at all, and there was no warning.
And I started to wonder, are there maximum number of pages? And so I created some folders and put existing apps in them, and the other apps magically appeared. (I forgot if I restarted iPad in order to see them).
And there seems to be maximum 20 apps per folder.
I just wonder why there was no warning whatsoever given iPad and Apple products are usually very well designed and user friendly. Are there official pages that describe this situation?