With yUML you can create and share simple UML (Unified Modelling Language) diagrams.
You do it using the yUML DSL (Domain Specific Language)
For example, if you code:
or if you code:
Those samples, are for CLASS diagrams type, you can create ACTIVITY and USE CASE diagrams type using yUML DSL.
So AndyUML is just a tool for using yUML DSL and http://yuml.me free service.
But with this Android client you are able to store locally your yUML DSL code 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.
You can get AndyUML at the Android Market place : https://market.android.com/details?id=com.yeradis.android.yuml
So, 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.
Class Diagram Samples at http://yuml.me/diagram/scruffy/class/samples
Activity Diagram samples http://yuml.me/diagram/scruffy/activity/samples
Use Case samples http://yuml.me/diagram/scruffy/usecase/samples
To finish this post, here are some shots from AndyUML Android app: