The 'US History TimelineFree' is an iPhone application that provides a comprehensive list of important events in US history. With this app, users can easily access information about each event through hot-links to the corresponding Wikipedia entries. Additionally, the app includes maps of important times, a list of significant individuals, and a comparison table of US history and world history.

One of the key features of the 'US History TimelineFree' is its easy accessibility, allowing users to explore and learn about US history on the go. The timeline provides a chronological overview of significant events, while the hot-links to Wikipedia offer more in-depth information for those seeking further details. The inclusion of maps helps users visualize the geographical context of important historical periods, while the list of people and presidents adds a human element to the study of history.

Please note that in order to access Wikipedia, 3G or WiFi connectivity is required. Additionally, it is important to remember that the explanations provided on Wikipedia may differ from the developer's opinions.

Overall, the 'US History TimelineFree' is a valuable educational resource for anyone interested in delving into the rich history of the United States.