Nice job, seems to work well. I love airdroid but it annoys me that I am constantly having to reconnect after I walk out of wifi range. If this gets around that issue then I'd swap.

One comment I had is that if I was to download this app on my device, the initial experience could be improved somewhat. The first screen is a login one and it says to go to your website, sign up and come back to the app. I did this on my mobile browser (chrome) and it was a bit clunky to sign up (I had the feedback/need help button hover over the form a bit). Perhaps instead of that, you could have a registration function right in the app? even if it was just a web view with a mobile optimized signup web page loaded. That way I don't have to leave the app.

Not a major thing but thought I'd offer you some feedback.