One of biggest disadvantage in your platform is you're asking users must to install your software, many people choose to play in web-based instead of installing something especially not really popular. If your poker can run without need to install the software, it will be better.
True, I’m currently getting an error message when I tried installing your app in my iOS. You should at least create something for those who do not welcome the idea of having to download an app before they can use your site to bet.
Even the tutorial on how to download and install the app on an iOS is something that some users won’t want to because at some certain step they would have to give permission your app and there’s no way to prove if that will pose any security risks or not.
P.S. I found out about this after I had already registered an account - I will have to put my review about your site on hold until I find a device (an android phone) to download and use it properly.
Btw, welcome to Bitcointalk.