Well, I am nearly 100% (about 99,9999999999%) sure that the S3 is based on Arm, as well as S1,S2 and S4. At least from S4 I have seen positive reports of the working app. I just think there is something wrong with the playstore... Why can't you (or whoever...) not just provide the apk somewhere? Not everybody needs the playstore to download and install an app..