Описание тега textedit
This tag is AMBIGUOUS, use with caution, since some questions use it for the built-in *text editor* of Max OS X, while others use it for a textedit field in *web development*, like Android for example.
TextEdit is a simple text editor based on the text system in Cocoa.
Source: Apple TextEdit.
A EditText is an overlay over TextView that configures itself to be editable. It is the predefined subclass of TextView that includes rich editing capabilities.
Source: Android EditText Control.