Forum runner and Tapatalk are of the same kind. We change our site to meet their requirements and then they sell the apps that work on the mobile device. Nothing wrong with that, but not necessarily the best way for our site.Have you considered an app that works with vBulletin, like Forum Runner. This is the app that they use as a companion to the AAW site.
I don't know much about Forum Runner and can't comment for or against it, I have only used it 2 times. I know there are also other apps of this kind that may be worth looking into.
I am not trying to direct you down a different path, I just wanted you to be aware that these options are out there.
I just thought one of these off the shelf apps may save you some headaches... or who knows they may cause more.
Vbullitin now has all the hooks built-in and they supply the necessary interface so that we can build our own mobile apps. So at some point the will be able to get an android or IOS custom app built expressly for our site. I feel more comfortable doing it that way (with vBulletin's built-in hooks). While it might take a bit longer, we will have something supported directly by our software.