tell me an (existing) iOS app that can play mp3 files from a Dropbox folder

I have some mp3 files in a folder synced to the cloud using Dropbox. I want to find an EXISTING iOS app where all I have to do is give it the location of the folder on Dropbox, and it will play the mp3 files in that folder, and generally work like a real music player. (i.e. I can put it on shuffle and it will play random songs from the folder, or it will let me make playlists. But this does NOT include silly "solutions" like opening the folder in the Dropbox app and clicking on the mp3 files one at a time with my finger :) ). The app should play the files by streaming them remotely, not downloading them to the iPhone. There was an app called SongBox that did this perfectly, but Apple pushed out some updates that caused the SongBox app to start working. All you have to do is find an existing app that does this; you don't have to write a new one. So the deliverable should just be the name of the app, and some basic instructions on how to use it unless it's very obvious. But you MUST TRY IT YOURSELF FIRST AND VERIFY THAT IT WORKS! I do NOT want to go through a list of "suggestions" one at a time and try them out and just keep pointing out one at a time that they don't work. To verify that the solution works, that means: - create a Dropbox account if you don't already have one - create a folder synced to Dropbox and put at least two mp3 files in it - install the app, point it to the mp3 folder within Dropbox - verify that the app can "shuffle" by randomly playing an mp3 file from within the folder, that you can search by name for a specific file, etc. It's fine if the solution requires more than one app, or something unusual, just as long as you have verified that the directions actually work. Thanks!