Thanks for the clarification shev.
It sounds like an exciting project.
However, I have a problem
When I run your app on my phone and try to connect to my Arduino / bluetooth it makes a connection, but imidietly disconnect again.
I know that my setup works because if I use any other bluetooth app on the phone there is no problem.
Edit:
My bad, I used the hardware serial, instead of pin 2 and 3.
Now it works.