WordPress for Android supports WordPress.com and self-hosted WordPress.org sites running WordPress 3.5 or higher.
Visit the forums to get help with the app: http://android.forums.wordpress.org
The Simplenote experience is all about speed and efficiency. Open it, write some thoughts, and you're done. As your collection of notes grows, you can search them instantly and keep them organized with tags and pins.
The best way to learn about Simplenote is to try it. Once you're up and running, visit simplenote.com to download it on other devices and start accessing your notes everywhere.