Another caveat for iPad users, when looking for an app to provide a content service, think about whether and how often the information must be updated to be safe to use. For example, a number of state legislative codes are available, but provided by individuals. There are two primary ways that apps work, according to my app-wise colleague-through connections to maintained websites or through direct downloads to the iPad. For example, if you go to the Wall Street Journal app, you will have a short delay while it reaches the headlines, then you select the articles of interest, and await their arrival. On the other hand, if you want a book, it could arrive as a single download. However, if you got your ebook through Amazon's Kindle for the iPad app, it should take you back to a WiFi-based reading. What you need to recognize, however, are the items where changes could be critical, like legalities or tax forms or latest weather reports. Critiquing the reliability of the provider is another key issue.