Oh, that's a shame. I googled UBB and Tapatalk, and found a comment on the UBB forum saying that Tapatalk were into being compatible, but we're just waiting for the release of v8. I didn't notice how old that post was, but it made v8 sound imminent.

I'll just have to put up with much squinting and pinching on my phone (first world problems, forsooth...)
If it's brokenless, don't suffix it...