Subscribe fiori apps in HCP

Hi experts,

I have a simple question. My client is willing to implement HCP and I was looking into fiori app library at

https://fioriappslibrary.hana.ondemand.com/sap/fix/externalViewer/

and I have a question. Is it possible to import / subscribe any fiori app available in this portfolio into HCP? Or we can only use the apps available in this library's section fiori apps on HCP? If it is possible to import any app, how can we do it?

Thanks!

AS