Seems a bit of a waste of time / hard earnt money to me. Id much rather pay for a proper dyno run and get accurate information along with what the fueling is actually doing, rather than some little gadget.
Dynolicious seemed a bit expensive for relatively short term interest (but I am happy to be corrected), so I downloaded the DynoBox app which is free. Not had any chance to test it yet, though...
Are you going to post your results/screenshots, David?
I treated myself to an iPhone for Christmas & there are some really useful apps available. In fact I'm posting this reply from a train near Crewe.
Fortunately, I know the manager of my local O2 store & he's put me on a staff contract which saves me 30% on the monthly charges. I'm really pleased with it.