I just downloaded App Folder and the first one I made is a Utilities folder. However, the built in calculator is not listed. What gives?
You can use live folders as a alternative option to app folders it's much faster and efficient.
Windows Phone 8.1 Update 1 adds native folder support. On older devices, it's only presently available through a developer preview:
http://forums.windowscentral.com/wi...-read-first-post-before-asking-questions.html