As the title says, I am looking for an alternative to iCloud Photo Library. I am on the $1 plan. While the $2.99 upgrade isn't much, I know that as my library grows, so will the bill, as my storage space will decrease. I already have an external 1TB hdd with a copy of the library, so it's interconnected to iCloud when I want it to be. Now I am wondering, if I use an NAS at home, are there easy to use frontend apps that allow for access of my photos at home and abroad? Or is this prevented by Apple's walled garden?