Hrm, I'd be very careful using that app on a non-native android device. You could up in a world of pain.

You could file a bug for this issue on our bugtracker

https://github.com/mclear/Android_NFC_Ring_Unlock/issues/

and we will take a look at it when enough people +1 it.

I can't really help out with the Blackberry, @Symple-Rich, I've never used one in my life!
The S2 though, those are a difficult unit. If it reads one of your inlays though, it should read all of them (especially the Alpha). Your method may be slightly off. Can you describe how you've found your sweet spot and what you do to get the ring to read?