I installed version 0.7.2 for Android on my HTC Inc2 and every time I try to create a project I get a message that authentication failed. I've tried every combination of username/password but nothing works.
I'm sorry you're experiencing this issue :(
Unfortunately, all currently available mobile apps are 3rd party solutions and we can't guarantee their reliability.
We will release our own app soon, but for now you can try this mobile version: