okay my mistake, Coconut20 is right its on the playstore but not on the galaxy store for some weird reason.
its the secure folder thats designed by Samsung, I've taken a screen shot of the search results. if you're trying to download the one from Samsung and its not installing then its a compatibility issue surely.
its the 3rd one down in the search results. all Samsung phones I've ever owned had it preinstalled, I never had to download it on my phone.