I made a pdf with hidden sections that can be revealed when you click on them. It works when I am using adobe reader on my pc but when those pdfs are opened on my mobile adobe reader or in the browser the hidden sections won’t turn transparent. They just won't respond when I tab on them and they stay grey.
This is doomed. Web browsers and mobile apps don't have the full function of forms. Some of them have none at all, some have subsets. There's nothing you can do to make a form that will run in general, only on specific apps - you probably need to tell your customers that they MUST use Acrobat Reader on Windows and Mac, and they MUST download to open. Even then you'll need to give plenty of tech support.