Default [Q] AC4 Companion APP won't install

I have been attempting to install the AC4 Companion app to my phone with no luck. It says it's incompatible. My device is unlocked and rooted, but with the official ROM installed. I have a Verizon nexus.
I've downloaded Market Helper to change my device to a different type, but it says there is still an error and it won't install. I have also tried other custom ROM's, but there is still the same error that pops up. Now I can't imagine why the AC4 app is incompatible, the Nexus is a decent phone, even if it is a few years old. Is there any sort of setting I can change, or ROM I can install to fix it?
Thanks for any help.