In-depth guide for using WordPress is located in this address: http://easywpguide.com/easy-wp-guide-v2-5-for-wordpress-3-6/
There is a free and easy to use mobile client for WordPress available on mobile phones and tablets. You can download it for iOS (iPhone, iPad), Android and Windows -devices on their respective stores.
How to use:
- Install the application on your mobile phone or tablet
- Open the application
- Add self-hosted WordPress blog
- Write the whole address of the blog and insert your username and password
- You can now begin using that blog via the application