Currently, I am working on creating a custom bootstrap menu that displays properly on an iPad screen size.
I have implemented the standard navbar code from Bootstrap with a few tweaks. While it works well on smartphones and laptops, the issue arises when viewing it on an iPad as the navbar becomes hidden. You can check out the top link here for reference:
http://sos-optic.com/headss.php
To see the problem firsthand, you can open up Google Chrome's console --> switch to phone view and then select the iPad option.