Android app not supported on my phone

I am unable to to use the app on my phone. I tried to get it from the Google app store but it says that my phone does not support it.

I refuse to use the free version because it's garbage with all the ads plus I already paid for the real version.

I already contacted someone from this site and basically got no real answer. Does anyone have any ideas?

I'm using a galaxy s2. It used to work before I installed cm9.

My phone is not jellybean so I don't think so.