With yUML you can create and share simple UML diagrams.
So AndyUML is just a tool, but with this Android client you are able to store locally your yUML codes on you device, share, delete and add new ones to your personal database.
IMPORTANT: WITH yUML/AndyUML YOU DON'T DRAW/DRAG &DROP DIGRAMS, YOU CODE/WRITE IT, for example try: [Class]
What is yUML?
yUML is an online tool for creating and publishing simple UML diagrams.
It's makes it really easy for you to:
Embed UML diagrams in blogs, emails and wikis.
Post UML diagrams in forums and blog comments.
Use directly within your web based bug tracking tool.
Copy and paste UML diagrams into MS Word documents and Powerpoint presentations.
Read more at http://yuml.me/faq
Also check their service for samples and help on yUML syntax.
NOTE: YOU NEED INTERNET CONECTION IN ORDER TO RENDER yUML DSL Code, Otherwise you will not be able to preview your diagrams, because is using yuml.me online service
Class Diagram Samples
Activity Diagram samples
Use Case samples