This is my 3rd ebook app this year. I decided to give this a try after reading because of the good reviews I read about it. And after going through it for the past 2 weeks, I agree with the reviews. I like the idea of the 24-hour time frame analogy used in this app to represent the history of our universe; from the beginning till present day. And it helps a great deal also that the illustrations are beautiful and vivid.
Being an app also means you find multimedia elements, which enhances the presentation. They are not very detailed but sufficient enough to paint a clear picture. One can always google up more details. But before that, having the big picture helps.
The timeline in this app is cool. There is this black hole which you can push the topics that you are done into... in a way it represents the theory that one day, everything around us will be sucked into the black hole when our world begins to collapse.... the end of times.
The journey back in time begins with The Big Bang. The explanation is simple enough, the expansion of energy from that one point... And the makers chose the events which they felt were defining moments of our vast universe. It's a good job done considering our limited understanding of our universe. This beats a paper and print book cos you get to move the timeline and see the progress of time.