Like others have already said, the idea behind this app is wonderful. I would love to have a timeline of US history at my fingertips at any given time. I also really like the addition of the maps and the important people. However, my biggest complaint is the lack of depth. Most of the entries have only a couple sentences for a "description." It is extremely simplified and I haven't really learned anything from it I did not already know.
The links to Wikipedia are nice, but combined with the poor quality of entries within the app, I feel like the links were included mainly as a substitute for putting some actual effort into detailing the information included in the app itself. If I want to use Wikipedia, I can just go straight to the website. I was hoping to have an app on my phone that would provide at least a decent summary of the historical events directly and ideally without having to go online.
Also, I feel I should mention that, along with lacking detail, some of the information included is either incorrect or only partially true. For example, this is the entry for the Boston Massacre:
"As British army fired at the crowd and five people were killed, the crowd began to riot."
Now, I'm not going to go into the poor grammar and the one-sentence "summary," and I will try not to chew your ear off with a long history lecture. What I will point out is what really happened was a mob was harrassing a British sentry and more soldiers were sent out to help him. They ordered the crowd to disperse, and only when the civilians turned violent and the soldiers began to fear for their lives did they shoot. In short: the riot provoked the firing, not the other way around, as this entry suggests.
Two stars because, while the app certainly has much potential, I am pretty disappointed with it the way it is now. I will, however, keep this downloaded on my phone in the hope that the makers will fix/revise the content and add more description. If they do, I would likely give it five stars.