Momix apk app on FireStick

I downloaded the app to my android phone and downloaded it my one of my FS by my “apps-to-fire” app. It downloaded, added username and password but didn’t pull up. Also, the user/pass screen came up as landscape mode. I guess this app would work on an android box but just wondering if it could work on FS. Thanx in advanx TP-fam.