Why can't I connect to my Kodi server from my Ipad?
Make sure that UPnP is turned on in settings in Kodi, then download Ark Mc lite from the iTunes store and look if it can see your Rpi. Mine does, but I am using an old version of the app on a 1st gen iPad. Or jailbreak the iPad and install Kodi, which will then see anything else running Kodi on your network.