Dont buy!
If you want Dropbox Support: dont buy this App. You have to do several steps to download 1 file (!!!) to local store and later back to Dropbox. You cant download folders, so you have to do all steps with all files. You also cant test (HTML+JavaScript) Files in Dropbox Folder, you have to move it to local.
Now I invested some cents more to textastic app and it works perfect for me.
Tomatenschaf about
Koder Code Editor, v2.0