By launch you mean start P3 and lift off? Can't you just move both sticks towards lower center to start it up then go? I'm pretty sure I did that with my P3 earlier today.
The initial pairing needs to happen using the app. I was not able to fly mine either until I did the initial pairing using the ANDROID app. Now I can fly without the app.
See if someone can let you use their android device for initial setup and registration and then you should be good.