Evernote not only is an Android app, but a service available on a wide range of devices -- supporting Android, iOS/MacOS X, Windows, and even Linux computers. A detailed description can be found e.g. in a Wikipedia Article. A quote from there:
A "note" can be a piece of formatted text, a full webpage or webpage excerpt, a photograph, a voice memo, or a handwritten "ink" note. Notes can also have file attachments. Notes can be sorted into folders, then tagged, annotated, edited, given comments, searched and exported as part of a notebook.
The Android app can of course be found in the Playstore.