Hi, For those who like to have a secret private folder to hold their private files, I recommend the EverReader Pro. It is not like other password protect folder apps; it's much better, more convenient, more efficient, more functional. It's basically a file reader (can view all sort of file type including MS office docs) plus simple file creating capability (e.g., text file), but no editing on office doc. I found using iTunes File sharing to transfer files from mac to the app is the most convenient, fast, and direct way than others' wi-fi web store/transfer route. AS for private folder function, this app provides two pw/pc protections (you can use either or both): first, you can set pw/pc to open the app, or second, there is a "Private" folder built-in and you can set a passcode to lock it (this way you can allow others use this app, but disallow them to enter and view anything in your "Private" folder. And it's FREE! (The only bug thing I am still not sure about is: there is a "orientation lock" in the setting with default "OFF". But I seemed not able to change from landscape to portrait; maybe it suppose to read doc in landscape mode? Not sure. or ... Any idea?)