Default EE Cash on Tap

Hi is it possible at all to use this app on Nexus 5 as I was looking everywhere and nothing did work and I really would like to use an app that i could pay like wirelles card. Im on EE but cant use it with Nexus 5 which is been out for so long and still not supported and they keep adding new phones like Galaxy s4 then s5 but still not for N5. Please help.