Although it isn't the remore control version, I think it still correct that the OP titled this Remote BIAB. Because it operates desktop BIAB remotely over the internet.

I find the app pretty useless, honestly. What if one is in an airplane, with no internet connection?

I would like to see BIAB develop a real portable version (BIYP--Band In Your Phone, or Band In Your Pants? ;-) ). In other words, which works on an IOS or Android device without needing any connection to the desktop. Smartphone and tablet processors are quite powerful now (even some quad core now!)and could certainly handle it.

The only thing that would have to be dropped is RealTracks/RealDrums, as these devices do not have enough storage for that, even with a larger memory card. Of coures though, the new MIDI SuperTracks could be used. Probably good if a good GM MIDI synth was built into the program. (Of course then, a file created in the portable version could later be transferred to one's desktop version, and then RealTracks added.)

There already are auto-accompaniment programs for portable devices. The best I have found is IRealB, now renamed IReal Pro, available on both IOS and Android. However, it isn't nearly as good as BIAB, and I think Android and IOS versions of BIAB would be much better.

Some people these days are using IOS and Android tablets and smartphones much more than desktops and laptops running Windows and Mac. I think if PG Music wants to keep up with that trend, it should create real portable versions of BIAB. The current "portable BIAB", which really is only a way to control desktop BIAB remotely, does not really fit that need.