I’m sure someone could make an argument that the entire /e/ OS is a “secure folder,” but I think we can all agree there are certain times when we want to keep photos/documents/files/etc on our phones but don’t necessarily want it being front and center when one opens the Gallery app.
Both Samsung and OnePlus have secure folder functionality either as a separate app or within their File Manager. I personally would like to see /e/ implement this as well
Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services